知识问答
最佳答案:19(x+1)÷[2x-(x²+1)/x]=(x+1)÷[(2x²-x²-1)/x]=(x+1)×[x/(x²-1)]=(x+1)×[x/(x-1)(x+1)]
最佳答案:1.X(2-√2)=(√2-2)X(2-√2)=(√2-2)X(2-√2)=-1(2-√2)x=12.(√5+√2)²-(√5-√2)²=(√5+√2+√5-√