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The Quadratic Formula - Problem 6 317 views

The quadratic formula is a useful solving technique when the solutions are not "pretty-" that is, not integers or kind fractions. Hence, the quadratic formula is almost always used to solve problems about real life. In particular, we can use the quadratic formula to determine how long it will take a projectile to hit the ground (or the water, for example.) Rather than finding the "x-intercepts," we are using the quadratic formula to find the "time- intercepts," or when the dependent variable (height) is zero. Use a calculator to get an appropriate decimal approximation.

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