Question

which equation is a quadratic formula?

a) 3x-y=8x+2
b) y=7x(5-2x) + 9
c) 7x^2+y= (3+x) (7x-1)
d) y-3=(x^2-3) (8x+3)

Answer 1

Do you know what a quadratic formula is?

Answer 2

yes

Answer 3

If you expand every expression, you will know it's a quadratic if it's of the form \(ax^2+bx+c\) where \(a \ne 0\) and \(b, c\) could be 0