1/(2-x)²,x/x²-4运用通分,现在就要,

问题描述:

1/(2-x)²,x/x²-4
运用通分,现在就要,


最简公分母为:(x-2)²(x+2)

1/(2-x)²=1/(x-2)²=(x+2)/(x-2)²(x+2)
x/(x²-4)=x/(x-2)(x+2)=x(x-2)/(x-2)²(x+2)