第119页

信息发布者:
B
A
B
解:$(x - 3)^2+2x(x - 3)=0$
$(x - 3)(x - 3 + 2x)=0$
$(x - 3)(3x - 3)=0$
$x - 3 = 0$或$3x - 3 = 0$
解得$x_1 = 3,x_2 = 1$
解:$2x^2+1 = 3x$
$2x^2-3x + 1 = 0$
$(2x - 1)(x - 1)=0$
$2x - 1 = 0$或$x - 1 = 0$
解得$x_1=\frac{1}{2},x_2 = 1$