Question

4(a-b)的平方-(2a+3b)的平方 因式分解

Answer 1

4(a-b)^2-(2a+3b)^2

=[2(a-b)+(2a+3b)]*[2(a-b)-(2a+3b)]

=(4a+b)(-5b)

=-5b(4a+b)