Question

Please help with my homework? :)
Which equation is a quadratic equation?

y = 2x(5 − x) + 7x

y = 8x + 2

y + x2 = (x − 2)(x + 8)

y − 7x = (x2 + 1)(x − 3)

Answer 1

I think it's the first one.

Answer 2

You are correct. Nice job.