(x-3)分之x+(x的2次方-3x)分之(x+6)=x分之(x-3)
问题描述:
(x-3)分之x+(x的2次方-3x)分之(x+6)=x分之(x-3)
答
x/(x-3)+(x+6)/(x²-3x)=(x-3)/xx²/x(x-3)+(x+6)/(x²-3x)=(x-3)/xx²/x(x-3)+(x+6)/x(x-3)=(x-3)/x(x²+x+6)/x(x-3)=(x-3)/xx(x²+x+6)=x(x-3)(x-3)x²+x+6=(x-3)²x²+x+6=x...