(x+9)(x+1)-(x-3)(x+2)=18的解法急.......................

问题描述:

(x+9)(x+1)-(x-3)(x+2)=18的解法
急.......................

(x+9)(x+1)-(x-3)(x+2)=18
x^2+10x+9- (x^2-x-6)=18
11x-3=0
x=3/11