Line Tangent to a Parabola

Directions: Use the digits 1 to 9, at most one time each, to fill in the boxes so that the line is tangent to the parabola.

Hint

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

Answer

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

Source: Erin Stenger

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