Question

please tell me this answer

Answer 1

Answer:

3+√7 / 3-√7

RATIONALISE

==> 3+√7 / 3-√7 × 3+√7 / 3+√7

==> (3+√7)² / (3)²-(√7)²

==> 9+7+6√7/9-7

==> 16+6√7/2

==> 2(8+3√7)/2

==> 8+3√7   =    A+B√7

SO, A= 8 AND B= 3