初中数学方程题目求高手指点
这个不叫方程,叫分式化简把
解:原式=(x+1)(x-1)分之2(x-1)-(x+1)(x-1)分之x(x+1)-(x+1)(x-1)分之(x+5)
=(x+1)(x-1)分之(2x-2-x²-x-x-5)
=(x+1)(x-1)分之(-x²-7)
=(x+1)(1-x)分之(x²+7)
2(x-1)/(x+1)(x-1)-x(x+1)/(x+1)(x-1)-(x+5)/(x+1)(x-1)
=(2x-2-x*x-x-x-5)/(x+1)(x-1)
=(x*x-7)(x*x-1)
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