Question

Expand and Simplify (√7-2)(√7+2)

Answer 1

Answer:

(√7)^2 - 2^2

7 - 4

the answer is 3

Answer 2

$( \sqrt{7} - 2)( \sqrt{7} + 2) \\ = 7 + 2 \sqrt{7} - 2 \sqrt{7} - 4 \\ = 7 - 4 \\ = 3$

We could simplify it directly by formula but we have first expanded and then simplified it respectively.

HOPE THIS COULD HELP!!!