Question

Find the product of ( a – b ) and ( a + b ). Hence evaluate it for a = 1 and b = –1.

Answer 1

Answer:

2,0

Step-by-step explanation:

please mark as brainliast answer

Answer 2

Answer:

$(a - b)(a + b) = {a }^{2} + ab - {b}^{2} - ab \\ = {a}^{2} - {b}^{2} \\ = { 1}^{2} - { (- 1})^{2} \\ = 1 - 1 \\ = 0$

Step-by-step explanation:

it is formula