<< Chapter < Page Chapter >> Page >

Strategie vir die oplos van vergelykings

Hierdie hoofstuk handel oor die oplos van verskillende soorte vergelykings met twee veranderlikes. Die algemene strategie is om die onbekende veranderlike alleen aan die linkerkant van die gelykaanteken te kry, met al die konstantes aan die regterkant van die gelykaanteken. Byvoorbeeld, in die vergelyking x - 1 = 0 , wil ons die vergelyking skryf as x = 1 .

Soos ons gesien het in hersiening van vorige werk, in die afdeling wat handel oor herrangskikking van vergelykings, is 'n vergelyking soos 'n weegskaal wat altyd gebalanseerd moet bly. Wanneer ons vergelykings oplos, moet ons in gedagte hou dat wat aan die een kant gedoen word, ook aan die ander kant gedoen moet word.

Metode: herrangskikking van vergelykings

Jy kan 'n getal optel, 'n getal aftrek, met 'n getal vermenigvuldig of met 'n getal deel, solank jy dieselfde bewerking aan beide kante doen.

Byvoorbeeld, in die vergelyking x + 5 - 1 = - 6 , wil ons x alleen aan die linkerkant van die vergelyking kry. Dit beteken ons moet 5 aftrek en 1 optel aan die linkerkant. Omdat ons die skaal gebalanseerd moet hou, moet ons ook 5 aftrek en 1 optel aan die regterkant.

x + 5 - 1 = - 6 x + 5 - 5 - 1 + 1 = - 6 - 5 + 1 x + 0 + 0 = - 11 + 1 x = - 10

In 'n ander voorbeeld, 2 3 x = 8 , moet ons deel met 2 en vermenigvuldig met 3 aan die linkerkant om x alleen te kry. Om die vergelyking gebalanseerd te hou moet ons ook aan die regterkant deel met 2 en vermenigvuldig met 3.

2 3 x = 8 2 3 x ÷ 2 × 3 = 8 ÷ 2 × 3 2 2 × 3 3 × x = 8 × 3 2 1 × 1 × x = 12 x = 12

Hierdie is die basiese reëls wat gevolg moet word wanneer 'n vergelyking vereenvoudig word. In die meeste gevalle moet die reëls herhaaldelik toegepas word voor ons die gewenste veranderlike as onderwerp het.

Die volgende moet ook in gedagte gehou word:
  1. Deling deur 0 is ontoelaatbaar.
  2. As x y = 0 , dan x = 0 en y 0 , want deling deur 0 gee 'n ongedefinieerde uitdrukking.

Ons is nou gereed om 'n paar vergelykings op te los!

Ondersoek: strategie vir die oplos van vergelykings

Identifiseer wat is verkeerd in die volgende bewerking:

4 x - 8 = 3 ( x - 2 ) 4 ( x - 2 ) = 3 ( x - 2 ) 4 ( x - 2 ) ( x - 2 ) = 3 ( x - 2 ) ( x - 2 ) 4 = 3

Oplos van lineêre vergelykings

Die eenvoudigste vergelyking om op te los is 'n lineêre vergelyking. ‘n Vergelyking word lineêr genoem indien die hoogste mag van die veranderlike (letter, byvoorbeeld x ) 1 (een) is. Die volgende is voorbeelde van lineêre vergelykings:

2 x + 2 = 1 2 - x 3 x + 1 = 2 4 3 x - 6 = 7 x + 2

In hierdie afdeling sal ons leer om te bepaal wat die waarde van 'n veranderlike moet wees om 'n vergelyking waar te maak. Byvoorbeeld, watter waarde van x maak beide kante van die baie eenvoudige vergelyking, x + 1 = 1 waar.

Aangesien die definisie van 'n lineêre vergelyking is dat die hoogste mag van die veranderlike een (1) moet wees, is daar hoogstens een oplossing of wortel vir die vergelyking.

Hierdie afdeling berus op al die metodes wat ons reeds bespreek het: uitvermenigvuldiging van uitdrukkings met hakies, groepering van terme en faktorisering. Maak seker dat jy goed vertroud is met hierdie metodes voordat jy die werk in die res van hierdie hoofstuk aanpak.

2 x + 2 = 1 2 x = 1 - 2 ( groepeer soortgelyke terme saam ) 2 x = - 1 ( so ver as moontlik vereenvoudig )

Questions & Answers

what is homeostasis?
Samuel Reply
what's physiology
AminchiSunday Reply
what is physiology
AminchiSunday
physically is the study of the function of the body
Najaatu
that is what I want ask
YAU
u are wright
YAU
pls what are the main treatment of hiccups
YAU
physiology is the study of the function of the body
Najaatu
hiccups happen when something irritates the nerves that course your diaphragm to contract
Najaatu
how did hypothalamus manege to control all activities of the various hormones
malual
how can I treat pain a patient feels after eating meals
Namuli Reply
how do I treat a three year old baby of skin infection?
Okocha Reply
It depends on the type of infection. Bacterial, fungal, parasitic or viral?
schler
if you can share the sign ad symptoms of the skin infection then u geh the treatment cox they're different sign ad symptoms of skin infection with different treatment
Sa
prostaglandin and fever
Maha Reply
yes
rayyanu
welcome sir
rayyanu
prostaglandin E2 is the final mediator.
Lemlem
prostaglandin E2 is the final mediator of fever.
Lemlem
yes
Agabi
good evening
Jediel
Discuss the differences between taste and flavor, including how other sensory inputs contribute to our  perception of flavor.
John Reply
taste refers to your understanding of the flavor . while flavor one The other hand is refers to sort of just a blend things.
Faith
While taste primarily relies on our taste buds, flavor involves a complex interplay between taste and aroma
Kamara
which drugs can we use for ulcers
Ummi Reply
omeprazole
Kamara
what
Renee
what is this
Renee
is a drug
Kamara
of anti-ulcer
Kamara
Omeprazole Cimetidine / Tagament For the complicated once ulcer - kit
Patrick
what is the function of lymphatic system
Nency Reply
Not really sure
Eli
to drain extracellular fluid all over the body.
asegid
The lymphatic system plays several crucial roles in the human body, functioning as a key component of the immune system and contributing to the maintenance of fluid balance. Its main functions include: 1. Immune Response: The lymphatic system produces and transports lymphocytes, which are a type of
asegid
to transport fluids fats proteins and lymphocytes to the blood stream as lymph
Adama
what is anatomy
Oyindarmola Reply
Anatomy is the identification and description of the structures of living things
Kamara
what's the difference between anatomy and physiology
Oyerinde Reply
Anatomy is the study of the structure of the body, while physiology is the study of the function of the body. Anatomy looks at the body's organs and systems, while physiology looks at how those organs and systems work together to keep the body functioning.
AI-Robot
what is enzymes all about?
Mohammed Reply
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems
Kamara
yes
Prince
how does the stomach protect itself from the damaging effects of HCl
Wulku Reply
little girl okay how does the stomach protect itself from the damaging effect of HCL
Wulku
it is because of the enzyme that the stomach produce that help the stomach from the damaging effect of HCL
Kamara
function of digestive system
Ali Reply
function of digestive
Ali
the diagram of the lungs
Adaeze Reply
what is the normal body temperature
Diya Reply
37 degrees selcius
Xolo
37°c
Stephanie
please why 37 degree selcius normal temperature
Mark
36.5
Simon
37°c
Iyogho
the normal temperature is 37°c or 98.6 °Fahrenheit is important for maintaining the homeostasis in the body the body regular this temperature through the process called thermoregulation which involves brain skin muscle and other organ working together to maintain stable internal temperature
Stephanie
37A c
Wulku
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Siyavula textbooks: wiskunde (graad 10) [caps]. OpenStax CNX. Aug 04, 2011 Download for free at http://cnx.org/content/col11328/1.4
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Siyavula textbooks: wiskunde (graad 10) [caps]' conversation and receive update notifications?

Ask