Open Middle®

Line Tangent to a Parabola

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box so that the line is tangent to the parabola.

Set the functions equal to each other. When solving this equation, the discriminant must be 0.

One possible answer:
y=x^2+6x+7
y=2x+3

Source: Erin Stenger

Directions: Using the digits -9 to 9, at most two times each, place a digit …