化简过程x^2-x-56.X^2-10x+16.6y^2+19y+15.14x^2+3x-27 M^2+5n-mn-5m
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化简过程x^2-x-56.X^2-10x+16.6y^2+19y+15.14x^2+3x-27 M^2+5n-mn-5m.M^2-n^2+2m-2n
x²-x-56
=(x-8)(x+7)
x²-10x+16
=(x-2)(x-8)
6y²+19y+15
=(2y+3)(3y+5)
14x²+3x-27
=(2x+3)(7x-9)
m²+5n-mn-5m=m²-mn+5n-5m
=m(m-n)-5(m-n)
=(m-5)(m-n)
m²-n²+2m-2n=(m+n)(m-n)+2(m-n)
=(m-n)(m+n+2)
=(x-8)(x+7)
x²-10x+16
=(x-2)(x-8)
6y²+19y+15
=(2y+3)(3y+5)
14x²+3x-27
=(2x+3)(7x-9)
m²+5n-mn-5m=m²-mn+5n-5m
=m(m-n)-5(m-n)
=(m-5)(m-n)
m²-n²+2m-2n=(m+n)(m-n)+2(m-n)
=(m-n)(m+n+2)
(x+y)(m+n)2-(x+y)(m+n)2
10道因式分解1.-7m(m-n)^3+21mn(n-m)^22.5x(x-2y)^2-10y(2y-x)^23.225
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