解方程:(x-14)/(x∧2-4)+x/(2-x)=1-2x/(x+2)
问题描述:
解方程:(x-14)/(x∧2-4)+x/(2-x)=1-2x/(x+2)
答
(x-14)/(x∧2-4)+x/(2-x)=1-2x/(x+2)(x-14)/[(x-2)(x+2)]-x/(x-2)=1-2x/(x+2)(x-14)-x(x+2)=(x-2)(x+2)-2x(x-2)x-14-x²-2x=x²-4-2x²+4x2x²-x²-x²+x-2x-4x=14-4-5x=10x=-2经验算,x=-2...