(1) Right. When X=-2, then 4a-2b+c=0, and b=2a+ 1/2c.

2 right. Since AC < 0 and neither A nor C is 0, the equation is a quadratic equation. △=b？ -4ac

Because B. ≥0 and AC < 0, 4ac < 0, so B? -4ac>0. Therefore, the equation always has two real roots.

3 wrong. Only when the equation is a quadratic equation with one variable can it have two real roots.