# Math Help - Solving Quadratic Inequality

1. ## Solving Quadratic Inequality

Calculate the range of values of $c$ for which $3x^2 - 9x + c > 2.25$ for all values of $x$.

2. Hint: $3x^2 - 9x + (c - 2.25)\ne0$ for all values of $x$ iff the discriminant of the quadratic polynomial is negative.