Question

5a^2- b^2 - 4ab + 7a - 7b​

Answer 1

Answer:

5a2−b2−4ab+7a−7b

=(a2−b2)+(4a2−4ab)+(7a−7b)

=(a+b)(a−b)+4a(a−b)+7(a−b)

=(a−b)(a+b+4a+7)

=(a−b)(5a+b+7)