Question

Anil applied ________ identity to solve (√5 + √7)(√5 − √7) (a) (a + b)(a – b) (b) (a + b)(a + b) (c) (a – b)(a – b) (d) (x + a)(x + b) (iv) (√2 + √3)(√2 − √3) equals (a) -1 (b) 5 (c) -5 (d) 1​

Answer 1

Answer:

Anile applied (a+b)(a-b) to solve.

Answer of second one is (a)-1.