因式分解:①(a+b)²-(a+b)②(a-b)²(a+b)-(b-a)(b+a)²③3(x-y)²-2x+2y
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/26 11:50:47
x){:{=O;^,_~ϬGӑ~O.hB[!)JM@DG*t+UhU$v6w|j 9`R0IDjB!a0t4!`S`&2StʀlsPPF&@m1!ҺFHƕF6yv '
因式分解:①(a+b)²-(a+b)②(a-b)²(a+b)-(b-a)(b+a)²③3(x-y)²-2x+2y
因式分解:①(a+b)²-(a+b)②(a-b)²(a+b)-(b-a)(b+a)²③3(x-y)²-2x+2y
因式分解:①(a+b)²-(a+b)②(a-b)²(a+b)-(b-a)(b+a)²③3(x-y)²-2x+2y
①(a+b)²-(a+b)
=(a+b)[(a+b)-1]
=(a+b)(a+b-1)
②(a-b)²(a+b)-(b-a)(b+a)²
=(a-b)²(a+b)+(a-b)(a+b)²
=(a-b)(a+b)[(a-b)+(a+b)]
=2a(a-b)(a+b)
③3(x-y)²-2x+2y
=3(x-y)²-2(x-y)
=(x-y)[3(x-y)-2]
=(x-y)(3x-3y-2)