解分解因式,9(x-y)²-6(y-x)+1

来源：学生作业帮助网编辑：作业帮时间：2024/05/09 03:36:19

解分解因式,9(x-y)²-6(y-x)+1
解分解因式,9(x-y)²-6(y-x)+1

解分解因式,9(x-y)²-6(y-x)+1
9(x - y)" - 6(y - x) + 1
= 9(x - y)" + 6(x - y) + 1
= 9(x - y)" + 3(x - y) + 3(x - y) + 1
= 3(x - y)[ 3(x - y) + 1 ] + [ 3(x - y) + 1 ]
= [ 3(x - y) + 1 ]( 3x - 3y + 1 )
= ( 3x - 3y + 1 )"