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 last one

Answer 2

The last one.

Answer 3

the one whose highest degree is 2 ( that is contains x^2)