Question

find product (a-7) (a+7)​

Answer 1

Answer:

a² - 7² (By using a²-b² = (a-b)(a+b) Identify)

Answer 2

Answer:

a² - 49

Step-by-step explanation:

(a-7) (a+7)

as

$(a + b) (a - b) = {a}^{2} - {b}^{2}$

therefore,

a² - 7²

= a² - 49