因式分解x²-6x(z-y)+9(z-y)²

因式分解x²-6x(z-y)+9(z-y)²
因式分解x²-6x(z-y)+9(z-y)²

因式分解x²-6x(z-y)+9(z-y)²
x²-6x(z-y)+9(z-y)²
=[x-3(z-y)]²
=（x-3z+3y）²
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x²-6x(z-y)+9(z-y)²
=(x-3z+3y)²

x²-6x(z-y)+9(z-y)²
=x²-2*x*[3(z-y)]+[3(z-y)]²
=[x-3(z-y)]²
=（x-3z+3y）²

x^2 - 6x(z-y) + 9(z-y)^2
= x^2 + 6x(y-z) + 9(y-z)^2
= x^2 + 2x(3y-3z) + (3y-3z)^2
= (x+3y-3z)^2