Which represents a quadratic function?
f(x) = −8x3 − 16x2 − 4x
f (x) = x 2 + 2x − 5
f(x) = + 1
f(x) = 0x2 − 9x + 7

Assuming that B is a squared leading coefficient, then this is a quadratic. A quadratic takes the form of ax^2 + bx + c.
Hope that helps. :)

Idon’t know this and this isn’t middle school work

The answer of the above is