4个回答
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a^2(x-y)-4a(y-x)+4(x-y)
=(x-y)(a^2+4a+4)
=(x-y)(a+2)^2
(x+y)(x-y)-(x+z)(x-z)
=x^2-y^2-(x^2-z^2)
=z^2-y^2
=(z+y)(z-y)
希望回答对你有帮助
=(x-y)(a^2+4a+4)
=(x-y)(a+2)^2
(x+y)(x-y)-(x+z)(x-z)
=x^2-y^2-(x^2-z^2)
=z^2-y^2
=(z+y)(z-y)
希望回答对你有帮助
展开全部
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展开全部
(x-y)(a+2)^2
展开全部
解:
(1)
a²(x-y)-4a(y-x)+4(x-y)
=a²(x-y)+4a(x-y)+4(x-y)
=(x-y)(a²+4a+4)
=(x-y)(a+2)²
(2)
(x+y)(x-y)-(x+z)(x-z)
=x²-y²-(x²-z²)
=z²-y²
=(z+y)(z-y)
(1)
a²(x-y)-4a(y-x)+4(x-y)
=a²(x-y)+4a(x-y)+4(x-y)
=(x-y)(a²+4a+4)
=(x-y)(a+2)²
(2)
(x+y)(x-y)-(x+z)(x-z)
=x²-y²-(x²-z²)
=z²-y²
=(z+y)(z-y)
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