Question

3m
10. Which of the following is equal to (a + 1)(a - 1)?
(a) (a + 1)2
(b) (a-1)
(c) A-62
(d) a - 1​

Answer 1

Answer:

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

hope it helps uH :)

Answer 2

Step-by-step explanation:

The correct option is not available here.

Answer will be (a² - 1)