Question

Which equation is a quadratic equation?

y = −4(3x + 2)

y + 3x3 = (x − 2)(3x + 8)

y − 3 = (2x2 + 11)(x − 1) + 3x

y + 5x = −2x(4 − x) + 1

Answer 1

The third equation is quadratic

Answer 2

the 4th one

Answer 3

a univariate polynomial equation of the second degree. A general quadratic equation can be written in the form ax^2+bx+c=0

Answer 4

a quadratic equation is of degree 2 NOT 3!!

Answer 5

The name Quadratic comes from "quad" meaning square, because the variable gets squared (like x2).