just use your normal methods to solve quadratic equations:
-5x^2+8x+9 = 0
I don't see any easy way to factor that, so try the quadratic formula or completing the square.
f(x) = 0, where
f(x) = -5x2 + 8x + 9
2 answers
In google type :
quadratic equation online
When you see list of results click on:
Free Online Quadratic Equation Solver: Solve by Quadratic...
When page be open in rectanlgle type:
-5 x ^ 2 + 8x + 9 = 0
and click option :
solve it!
You will see solution step - by - tep
quadratic equation online
When you see list of results click on:
Free Online Quadratic Equation Solver: Solve by Quadratic...
When page be open in rectanlgle type:
-5 x ^ 2 + 8x + 9 = 0
and click option :
solve it!
You will see solution step - by - tep