Question

Which equation is a quadratic equation?
Answer

y = 2x(5 - x) + 7x

y = 8x + 2

y + x2 = (x - 2)(x + 8)

y - 7x = (x2 + 1)(x - 3)

Answer 1

he is wrong it is the first one

Answer 2

x^2 is on both sides in the third one and therefore nonexistant

Answer 3

medal please

Answer 4

so its the first not the third?

Answer 5

yes

Answer 6

ivan's right, but the reason is a quadratic equation has the formula \[ax ^{2} + bx + c\] and the 1st satisfies this.

Answer 7

Thanks