问题
解答题
解下列方程:
(1)3x(x+2)=5(x+2);
(2)(x-2)(3x+1)=10.
答案
(1)3x(x+2)-5(x+2)=0,
(x+2)(3x-5)=0,
x1=-2,x2=
;5 3
(2)原方程化为:3x2-5x-12=0,
(x-3)(3x+4)=0,
解得:x1=3,x2=-
.4 3
解下列方程:
(1)3x(x+2)=5(x+2);
(2)(x-2)(3x+1)=10.
(1)3x(x+2)-5(x+2)=0,
(x+2)(3x-5)=0,
x1=-2,x2=
;5 3
(2)原方程化为:3x2-5x-12=0,
(x-3)(3x+4)=0,
解得:x1=3,x2=-
.4 3