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14

Practice Grockit Quadratic Functions ACT Question - Problem Solving

grockit.com This is an advanced quadratic function question, because it involves more than just one variable. Like almost always in math, there is more than one way to solve this. The easiest way to solve it would be to use the meaning of a 'solution' of a quadratic equation to our advantage. A solution, x, of F(x) = ax² + bx + c, is a number that makes F(x) = 0. If x = -2a or x = 4b, then F(-2a) = 0 and F(4b) = 0, as well... More ... Less ...
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