Question

16.Expand using formula (a+b)(a-b) = a² – b
².
1) (x-4) (x+4)
2)(2a+3)(2a-3)
3)(5ab-7x)(5ab+7x).




please help me​

Answer 1

Answer:

Ans1) x^2 - 16

Ans2) 4a^2 - 9

Ans3) 25a^2b^2 - 49x^2

Please mark as brainliest

Answer 2

Answer:

1. x^2 - 16

2. 4a^2 - 9

3. 25(ab)^2 - 49x^2

PLEASE MARK ME AS BRAINLIST