5x+2=3x^2和x^2+12x+27=0

问题描述:

5x+2=3x^2和x^2+12x+27=0
5x+2=3x^2
x^2+12x+27=0

(1)5x+2=3x^2
3x^2-5x-2=0
(3x+1)(x-2)=0
x=-1/3;x=2
(2)x^2+12x+27=0
(x+3)(x+9)=0
x=-3;x=-9