x(x‐y)﹢y(y‐x)分解因式

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x(x‐y)﹢y(y‐x)分解因式

x(x‐y)﹢y(y‐x)分解因式
x(x‐y)﹢y(y‐x)分解因式

x(x‐y)﹢y(y‐x)分解因式
x(x‐y)﹢y(y‐x)
=x(x‐y)-y(x-y)
=(x-y)²

x(x‐y)﹢y(y‐x)
=x(x‐y)-y(x-y)
=(x-y)^2

x(x‐y)﹢y(y‐x)=x(x‐y)-y(x‐y)=(x-y)^2

(x‐y)*(x‐y)

原式= x(x‐y)-y(x‐y)
=(x‐y)(x+y)
=x^2-y^2

=x^2-xy+y^2-xy
=x^2-2xy+y^2
=(x-y)^2
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