解分解因式,9(x-y)²-6(y-x)+1
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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)+19(x-y)"-6(y-x)+1=9(
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 )"