Question

(√3 - √7) (√3 + √7)​

Answer 1

(√3-√7)(√3+√7)

=(√3)²-(√7)²

=3-7

= -4

Hence, your answer is -4

Formula used here:

a²-b²=(a-b)(a+b)

and vice verse,i.e.,

(a-b)(a+b)=a²-b²

Answer 2

Answer:

use the formula (a+b)( a-b) = a²-b²

Step-by-step explanation:

so, by applying formula,

root 3 square -root 7 square=3-7=-4

hope you liked my answer