Question

I think i got this right: Which equation is NOT a quadratic equation?
A. y = x^2 + 6x - 5
B. y = 2x + 5
C. y = 2x^2 + 5
D. y = 4x^2

Answer 1

deg(f(x))>1 is a quadratic
therefore B is linear not quadratic

Answer 2

b

Answer 3

@CoCoTsoi The degree has to be exactly 2 to be a quadratic. So while B is correct, if the degree were 3 it would not be a quadratic. Rather, it would be a cubic.

Answer 4

Okay thnk u guys very much ;)

Answer 5

@kinggeorge, you are right. I have made a mistake. Thanks for teaching me. :D

Answer 6

Don't worry, everyone makes their own mistakes.