因式分解-x^m-x^m-1
原式=-x^(m-1)(x+1)
x的m方-x的m+1方因式分解
x^m - x^(m + 1)= x^m(1 - x)
因式分解(m-1)x-(x^2-m)
mx-x-x^2+m
=m(x+1)-x(x+1)
=(x+1)(m-x)
x^2-xy+2yz-4z^2
x^2-xy+2yz-4z^2=(x+2z-y)(x-2z)
因式分解:x^3+xy^2-xy^2-y^3
x^3+xy^2-xy^2-y^3
=x^3-y^3
=(x-y)(x^2+xy+y^2)
分解因式(z²;+1)²;-4z(z²;+1)+4z²;
(z²;+1)²;-4z(z²;+1)+4z²;
=(z²;+1-2z)²;
=(z-1)的4次方
如果本題有什麼不明白可以追問,
4(x-y)²;-4z(x-y)+z²;因式分解
4(x-y)²;-4z(x-y)+z²;
=[2(x-y)-z]²;
=(2x-2y-z)²;
4x^2-9y^2+12yz-4z^2因式分解
4x2-(9y2-12yz+4z2)=4x2-(3y-2z)^2=(2x+3y-2z)(2x-3y+2z)
分解因式x的平方y的平方-4z的平方
x²;y²;-4z²;
=(xy+2z)(xy-2z)
m-[n-2m-(m-n)]等於()
A. -2mB. 2mC. 4m-2nD. 2m-2n
原式=m-[n-2m-m+n],=m-n+2m+m-n,=4m-2n.故選C.