问题
填空题
3x2+2x-2=3(x+______)2+______.
答案
3x2+2x-2=3(x2+
x)-2=3(x2+2 3
x+2 3
-1 9
)-2=3(x+1 9
)2-1 3
.7 3
3x2+2x-2=3(x+______)2+______.
3x2+2x-2=3(x2+
x)-2=3(x2+2 3
x+2 3
-1 9
)-2=3(x+1 9
)2-1 3
.7 3