Question

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

1st one

Answer 2

can you help me with another

Answer 3

sure

Answer 4

What is the value of the coefficient of "a" when the quadratic equation y = (5x − 2)(2x + 3) is written in standard form?

−11

−6

7

10

Answer 5

ok all you have to do is foil that out, combine like terms and you will have it in the form of \[y = ax^2 + bx + c\] where a can easily be found

Answer 6

its 10

Answer 7

there ya go!

Answer 8

ty