5.1.3 Solving Quadratic Equations by Graphing and Factoring - Practice
1. Identify the zeros of the function h ( x ) = x 2 + 2 x .
2. Identify the zeros of the function g ( x ) = x 2 − 5 x − 36.
3. Identify the roots of the equation x 2 − 10 x + 25 = 0 by factoring.
4. Identify the roots of the equation x 2 + 21 = 10 x by factoring.
5. Identify a quadratic function that is in standard form and has zeros − 11 and 6.
6. A golfball is hit from ground level with an initial vertical velocity of 80 ft/s. Use the function h ( t ) = − 16 t 2 + v 0 t + h 0 , where h ( t ) is the height of a golfball hit with initial vertical velocity v 0 from initial height h 0 after t seconds in the air, to find the time at which the golfball will hit the ground.
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