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x^2+2x+1/3x^2-1/2xx^2-x-2/1的最简公分母是
题目详情
x^2+2x+1/3 x^2-1/2x x^2-x-2/1的最简公分母是
▼优质解答
答案和解析
3/(x^2+2x+1)=3/(x+1)^2=3(x-1)(x-2)/(x-1)(x-2)(x+1)^2
2x/(x^2-1)=2x/(x+1)(x-1)=2x(x+1)(x-2)/(x-1)(x-2)(x+1)^2
1/(x^2-x-2)=1/(x-2)(x+1)=(x-1)(x+1)/(x-1)(x-2)(x+1)^2
2x/(x^2-1)=2x/(x+1)(x-1)=2x(x+1)(x-2)/(x-1)(x-2)(x+1)^2
1/(x^2-x-2)=1/(x-2)(x+1)=(x-1)(x+1)/(x-1)(x-2)(x+1)^2
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