Question

25(a+b)²-9(a-b)² 因式分解，有步骤

Answer 1

原式=[5(a+b)+3(a-b)]*[5(a+b)-3(a-b)]
=[5a+5b+3a-3b]*[5a+5b-3a+3b]
=(8a+2b)(2a+8b)
绝对正确，选我的吧亲

追问

1

Answer 2

原式=[5(a+b)+3(a-b)]*[5(a+b)-3(a-b)]
=[5a+5b+3a-3b]*[5a+5b-3a+3b]
=(8a+2b)(2a+8b)

Answer 3

25(a+b)²-9(a-b)²
=[5(a+b)+3(a-b)][5(a+b)-3(a-b)]
=[5a+5b+3a-3b][5a+5b-3a+3b]
=[8a+2b][2a+8b]

Answer 4

25(a+b)²-9(a-b)²
=[5(a+b)]^2-[3(a-b)]^2
=(5a+5b)^2-(3a-3b)^2
=（5a+5b+3a-3b）（5a+5b-3a+3b）
=（8a+2b）（2a+8b）
=4（4a+b）（a+4b）