Question

7a2 – 63b2 = ? a) (7a - 9b) (9a + 7b) b) 7a - 9b) (7a+ 9b) c) 9(a – 3b)(a + 3b) d) 7(a – 3b)(a + 3b)​

Answer 1

Answer:

a) (7a - 9b) (9a + 7b)

is the correct answer

Answer 2

Answer:

7(a+3b)(a-3b)

Step-by-step explanation:

a^2 - b^2 = (a+b)(a-b)