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

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

anonymous · Answer

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

dumbcow · Answer

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

dumbcow · Answer

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

anonymous · Answer

sooo  

 y + x2 = (x − 1)(x + 7)

 y − 9 = (x − 1)(x2 + 4)
 coul be the answers?

anonymous · Answer

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

dumbcow · Answer

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