Question

Mul:(root7+root2)(root7-root2)

Answer 1

HERE IS YOUR ANSWER.......

Answer 2

this answer is in the form of a^2-b^2

because a^2-b^2=(a+b)(a-b)

as (√7+√2)(√7-√2)

here value of a=√7 b=√2

so (√7+√2)(√7-√2) ( a+b)(a-b)

so √7^2-√2^2

so 7-2=5