# Solve:

Solve:

2r

2r

^{2}+7r-r^{2}-9**Your answer:**Tips to related online calculators

Looking for help with calculating roots of a quadratic equation?

Solve:

2r^{2}+7r-r^{2}-9

**Your answer: **

2r

Tips to related online calculators

Looking for help with calculating roots of a quadratic equation?