Directions: Using the digits 0 to 9 at most one time each, fill in the boxes to make one function have no real roots, another function have one real root, and the last function have two real roots.

### Hint

How do you know that a quadratic equation has only one solution?

### Answer

There is more than one answer. Here are some possibilities:

a) y = 5x^2 + 3x + 7

b) y = 1x^2 + 6x + 9

c) y = 4x^2 + 8x + 2

a) y = 5x^2 + 3x + 7

b) y = 1x^2 + 6x + 9

c) y = 4x^2 + 8x + 2

Click on this link to see another possibility: Discriminant

Source: Lynda Chung