Question

After being rearranged and simplified, which of the following equations could be solved using the quadratic formula?

Check all that apply.

A. 2x2 - 3x + 10 = 2x + 21
B. 2x2 - 6x - 7 = 2x2
C. 5x2 + 2x - 4 = 2x2
D. 5x3 - 3x + 10 = 2x2

Answer 1

A. and C.
B. is linear and D. is a cubic

Answer 2

can u explane plz...i want tolean this thing...quadratic formula..@robtobey

Answer 3

I'll explain, bro.

Answer 4

The quadratic formula is awesome. Basically the idea is that any polynomial where the highest exponent for x is 2, you can just plug the different coefficients into the formula, and it'll tell you what values of x make the polynomial 0.

Now, the only trick is that if you have an equation like that, you have to put it in the form Ax^2 + Bx + C = 0. A, B, and C can be any constant numbers. As long as they aren't variables, you're good.

Answer 5

thanks a lot@smoothmath

Answer 6

Now, one thing... those coefficients are allowed to be 0.

Answer 7

Well. As long as A isn't 0. Because in the quadratic, then you would divide by 0. But B or C can be. Just be aware of that.