Which of the following is a quadratic function

y=2x^3-9y+4

5x-3y=-6

y=2x^2-12x+9

y=-x^2+5√x-16

Answer: y = 2x² - 12x + 9

Step-by-step explanation:

Quadratic equation must be in the form:

y = ax² + bx + c

The only equation provided that is in this form is:

y = 2x² - 12x + 9