来自冯海将的问题
【分式化简1-[(x-1)/x]÷{[x/(x+2)]-[1/(x^2+2x)]}】
分式化简1-[(x-1)/x]÷{[x/(x+2)]-[1/(x^2+2x)]}
1回答
2020-06-05 16:03
【分式化简1-[(x-1)/x]÷{[x/(x+2)]-[1/(x^2+2x)]}】
分式化简1-[(x-1)/x]÷{[x/(x+2)]-[1/(x^2+2x)]}
1-[(x-1)/x]÷{[x/(x+2)]-[1/(x^2+2x)]}
=(x-x+1)/x÷x/{(x+2)-1/[x(x+2)]}
=1/x÷[(x-2)(x+2)/x(x+2)-1/x(x+2)]
=1/x÷[x²-2²-1/x(x+2)]
=1/x÷(x²-5)/x(x+2)
=1/x×x(x+2)/(x²-5)
=(x+2)/(x²-5)