Question

Which equation is a quadratic equation?

y = −4(3x + 2)

y + 3x3 = (x − 2)(3x + 8)

y − 3 = (2x2 + 11)(x − 1) + 3x

y + 5x = −2x(4 − x) + 1

Answer 1

Which one do you think it is?

Answer 2

y = −4(3x + 2)

y = −12x - 8

which is in y = mx+b form, which is a line, so that rules choice A out

Answer 3

ok

Answer 4

you want something where you can rearrange it into the form y = ax^2+bx+c

Answer 5

so which answer choice can be written into y = ax^2+bx+c form

Answer 6

so either C or D right?

Answer 7

good, choice B is ruled out because it has an x^3 term

Answer 8

what happens when you multiply out (2x^2 + 11)(x − 1)

Answer 9

i don't know

Answer 10

what is 2x^2 times x

Answer 11

2x^3

Answer 12

look at this image

Answer 13

so that rules out choice C because choice C has a cubic term

Answer 14

oh thanks for helping me

Answer 15

np

Answer 16

so D is right