Question

Identify which equation is a quadratic equation.

y = 3x(x + 8) − 15

y = −2x − 9

y + x2 = (x − 5)(x + 6)

y − 8 = (x − 8)(x2 + 5)

Answer 1

the first one is quadratic. when you expand it, you will know.

Answer 2

Thank you!!:)

Answer 3

no prob :)