问题
解答题
解方程:
(1)x2+4x-5=0;
(2)2x(x-1)+3(x-1)=0.
答案
(1)x2+4x-5=0,
(x+5)(x-1)=0,
x+5=0或x-1=0,
∴x1=-5,x2=1.
(2)2x(x-1)+3(x-1)=0,
(x-1)(2x+3)=0,
x-1=0或2x+3=0,
∴x1=1,x2=-3 2
解方程:
(1)x2+4x-5=0;
(2)2x(x-1)+3(x-1)=0.
(1)x2+4x-5=0,
(x+5)(x-1)=0,
x+5=0或x-1=0,
∴x1=-5,x2=1.
(2)2x(x-1)+3(x-1)=0,
(x-1)(2x+3)=0,
x-1=0或2x+3=0,
∴x1=1,x2=-3 2