Question

Which equation is a quadratic equation?

A. y + 7 = −3x(4 − x) + 9x
B. y = −2x + 5
C. y + 2x3 = (2x − 2)(x + 5)
D. y − 9x = (x2 + 1)(5x − 1) + 3

Answer 1

a

Answer 2

A

Answer 3

Pretty sure C is quadratic, as well. B is linear, D is cubic.

Answer 4

A) y = 3x^2 -3x -7

Answer 5

i thought so to but I think that's a 2x^3. i did the same with d...

Answer 6

C is a cubic, not a quadratic.

Answer 7

OK, I now see the exponent in the problem without carat ^. Yes. Cubic.

Answer 8

asker, all you need to do is find the degree of the polynomial... if the degree is 2, it's a quadratic.