1元2次方程求解:100x-100=9x^2

问题描述:

1元2次方程求解:
100x-100=9x^2

原式可化为
9x^2-100x+100=0;

(9x-10)*(x-10)=0;
解得
x1=10/9;x2=10.

20或 10/9

用因式分解法:
9x^2-100x+100=0
即(x-10)(9x-10)=0
x1=10,x2=10/9