Math, asked by vanudayshokeen, 1 year ago

state whether (7-√5) (7+√5) is rational or irrational number

sunnysingh84: rational

sunnysingh84: 49-5=44 so it's a real number

vanudayshokeen: how

vanudayshokeen: ok thanks

sunnysingh84: (a+b) (a-b)=a^2-b^2

sunnysingh84: (7-√5) (7-√5)=7^2-√5^2=49-5=44

Answers

Answered by Anonymous

answer will be 44
it's an rational number

sunnysingh84: you are wrong

Answered by gungunpatwal1

Answer:

The answer is 44

Step-by-step explanation:

( 7-✓5 ) ( 7+✓5 )

a=7 and b= ✓5

Using identity a^2 - b^2

( 7 ) ^2 - ( ✓5 )^2

49 - 5

So it is a rational no.

Hope this will help

Plz mark as brainliest answer

vanudayshokeen: thanks i got the better explanation

gungunpatwal1: Plz mark as brainliest answer

vanudayshokeen: done

gungunpatwal1: Thx

wwwarshpundir2003: Hi.

gungunpatwal1: hlo

wwwarshpundir2003: 10th ?

gungunpatwal1: yup

Previous Question

Next Question