分解因式
(1)3(x-y)+2(y-x)²
=3(x-y)+2(x-y)²
=(x-y)[3+2(x-y)]
=(x-y)(3+2x-2y)
分式计算
(1)1/(x-1)+1/(1+x)
=(x+1)/[(x+1)(x-1)]+(x-1)/[(x+1)(x-1)]
=(2x)/[(x+1)(x-1)]
=(2x)/(x²-1)
分解因式
(1)3(x-y)+2(y-x)²
=3(x-y)+2(x-y)²
=(x-y)[3+2(x-y)]
=(x-y)(3+2x-2y)
分式计算
(1)1/(x-1)+1/(1+x)
=(x+1)/[(x+1)(x-1)]+(x-1)/[(x+1)(x-1)]
=(2x)/[(x+1)(x-1)]
=(2x)/(x²-1)