Question

Which equation is a quadratic equation?

y + 7 = −3x(4 − x) + 9x
y = −2x + 5
y + 2x3 = (2x − 2)(x + 5)
y − 9x = (x2 + 1)(5x − 1) + 3

Answer 1

y+7=-3x(4-x)+9x
y+7=-12x+3x^2+9x
y+7=3x^2-3x
y=3x^2-3x-7

Answer 2

yes.

Answer 3

So do you get it?

Answer 4

do it would be answer d

Answer 5

Remember that the quadratic equation is ax^2+bx+c=0

Answer 6

thank you so much

Answer 7

No problem