Question

Which of the following is a quadratic function?

Answer 1

option A

Explanation:

A quadratic equation is a single variable polynomial of degree 2.

`A ) y = ( x + 2)(2x-3) = 2x^2 -3x +4x - 6 =2x^2 + x - 6 \ - Yes \\\\B) y = 3(x - 4) \ - No\\\\C) y = (1)/(x^2) \ - No\\\\D) y = x(x-4)(x+3) = x(x^2 -x - 12) = x^3 -x^2 - 12x \ - No`

Answer 2

A

Explanation:

A

when multiplied out

the highest exponent of x is 2

y = 2x² + x - 6