Open Middle®
Directions: Using the digits 0 to 9, at most one time each, place a digit in each box 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