因式分解:x²-y²-x+y
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原式:x²-y²-x+y
=(x²-y²)-(x-y)
=(x+y)(x-y)-(x-y)
=(x+y-1)(x-y)
=(x²-y²)-(x-y)
=(x+y)(x-y)-(x-y)
=(x+y-1)(x-y)
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这个简单,只需要用平方差公式和乘法分配律就行了。
x²-y²-x+y
=(x²-y²)-(x-y)
=(x+y)(x-y)-(x-y)
=(x+y-1)(x-y)
x²-y²-x+y
=(x²-y²)-(x-y)
=(x+y)(x-y)-(x-y)
=(x+y-1)(x-y)
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x²-y²-x+y=
(x²-x + 1/4) - (y²- y + 1/4)=
(x-1/2)² - (y-1/2)² = (x+y-1)(x-y)
(x²-x + 1/4) - (y²- y + 1/4)=
(x-1/2)² - (y-1/2)² = (x+y-1)(x-y)
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x²-y²-x+y
=(x+y)(x-y)-(x-y)
=(x-y)(x+y-1)
=(x+y)(x-y)-(x-y)
=(x-y)(x+y-1)
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