49=36+x^2-2x6xx1/5
13=x^2-12x/5
65=5x^2-12x
5x^2-12x-65=0
(5x+13)(x-5)=0
5x+13=0 x-5=0
x1=-2.6 x2=5
49=36+x方-2乘6x乘5分之1,怎么解的啊.还有,什么情况下这种方程的解有两个?
49=36+x^2-2x6xx1/5
13=x^2-12x/5
65=5x^2-12x
5x^2-12x-65=0
(5x+13)(x-5)=0
5x+13=0 x-5=0
x1=-2.6 x2=5