Question

Which equation is a quadratic equation?

5x − 2 = y

y + 15x2 = (3x − 2)(5x + 7)

y = 3x(5 − x) + 7

y + 2 = (3x2 + 10)(x − 1)

Answer 1

Let me ask you this, which equation looks like you'd have to use the quadratic equation on? Or which one looks like the form of ax^2+bx+c

Answer 2

idk im confused

Answer 3

do you know what the quadratic equation is?

Answer 4

any equation which could be expressed at \[a x ^{2} + bx + c = 0\] is a quadratic equation where a, b are constants.
so you need to expand all the equations ie. simplify them . Then see if any of them matches rthe quadratic equation criteria.
If you face issues , do ask.