Question

Which of the following is not irrational?
(a) (2 – √3)2
(b) (√2 + √3)2
(c) (√2 -√3)(√2 + √3)
(d) 2√7/7

Answer 1

Answer:

c no. is not irrational

hope the answer is correct

Answer 2

Answer:

option (c)

Step-by-step explanation:

(√2+√3)(√2-√3)

it is in the form of (a+b)(a-b)

I hope you have already learned about the formula: (a+b)(a-b)=(a-b)^2

So.......

(√2+√3)(√2-√3)

(√2-√3)^2

2-3

-1

it is not a irrational number

Hope it help...........