Question

Identify which equation is a quadratic equation.

y = −6x − 3

y + x2 = (x − 1)(x + 7)

y − 9 = (x − 1)(x2 + 4)

y = 5x(x + 3) − 8

Answer 1

Idk how to determine the difference between a regular and quadratic equation

Answer 2

quadratic just means the highest exponent is 2
so if the equation has an "x^2" term , then it is a quadratic

Answer 3

looks like they are trying to trick you here....make sure you combine all like terms, try to get y by itself on left side

Answer 4

sooo

y + x2 = (x − 1)(x + 7)

y − 9 = (x − 1)(x2 + 4)
coul be the answers?

Answer 5

i think its this one : y + x2 = (x − 1)(x + 7)

Answer 6

first one could be but what happens after you multiply (distribute) and combine like terms?

second one is not because what happens when you multiply x by x^2