Solve 9x^2-17x-85=0

To solve 9x^2-17x-85=0 (also written as 9x²-17x-85=0), we notice that it is already in the standard form ax²+bx+c=0.

These are the coefficients, where a=9, b=-17, and c=-85.

We now substitute the coefficients into the quadratic equation formula and simplify. Notice that since coefficient b is a negative number - (-17) becomes +17. Students trip here, so you should sort that part out at the very beginning to avoid making any errors.

This is the first solution.

This is the second solution.