### Example 1

Use the quadratic formula to find the roots of
*
y* = -*x*^{2} + 5*x* – 2

### Example 2

Use the quadratic formula to find the roots of
*
y* = *x*^{2} – 3*x* – 8

### Example 3

Use the quadratic formula to find the roots of
*
y* = -4*x*^{2} + *x* – 3

### Example 4

Use the quadratic formula to find the roots of
*
y* = *x*^{2} + 3*x
*

### Example 5

Use the quadratic formula to find the roots of