Question

Which equation is a quadratic equation?
Choose one answer.
a. y + 3 = 5x + 10
b. y + 4x2 = (4x − 2)(x + 3)
c. y − 8x = (x2 + 1)(9x − 7)
d. y = 2x + 7x(x + 1)

Answer 1

Ax^2+Bx+C=0 quadratic equation
only one variable should raised to the 2nd power

Answer 2

Therefore it is B

Answer 3

???

Answer 4

Wait B and C match that

Answer 5

equations are not in standard form
so you might need to write thm in standard form or just put that into calculator

Answer 6

quadratic graph looks like n or u shape

Answer 7

So answer is D

Answer 8

how ?

Answer 9

Because it has the N or U shape

Answer 10

yes:)

Answer 11

Thanks!