Select all of the following that are quadratic equations. 5x - 1 = 3 x+8
5 X-3 = 0
02-2x= 4 x+1
2 x2+ 12 x = 0
ox3.6 x2 + 8 = 0
9X+6 x-3=0

2x^2+ 12 x = 0

3.6x^2 + 8 = 0

Step-by-step explanation:

Quadratic equations are those with the variable to the power of 2

2x^2+ 12 x = 0

3.6x^2 + 8 = 0

None of the other equations have the variable raised to the power of 2

there is no question content here, but you for the free points! : d

thats not a system of equations, that is a solution