问题
解答题
解方程:
①(x+2)(x-1)=4
②(x+3)2+2(x+3)-3=0.
答案
①(x+2)(x-1)=4,
整理得:x2+x-6=0,
(x+3)(x-2)=0,
x+3=0,x-2=0,
x1=-3,x2=2.
②(x+3)2+2(x+3)-3=0,
(x+3+3)(x+3-1)=0,
x+3+3=0,x+3-1=0,
x1=-6,x2=-2.
解方程:
①(x+2)(x-1)=4
②(x+3)2+2(x+3)-3=0.
①(x+2)(x-1)=4,
整理得:x2+x-6=0,
(x+3)(x-2)=0,
x+3=0,x-2=0,
x1=-3,x2=2.
②(x+3)2+2(x+3)-3=0,
(x+3+3)(x+3-1)=0,
x+3+3=0,x+3-1=0,
x1=-6,x2=-2.