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Algebra
Pregunta

11.Solve the equation by using the quadratic formu...

11.Solve the equation by using the quadratic formula. Then check if your solutions are correct by solving by completing the square. \( x ^ { 2 } - 4 x = 19 \) 

A tennis ball is hit straight up in the air, and its height, in feet above the ground, is modeled by the equation \( f ( t ) = 4 + 12 t - 16 t ^ { 2 } \) , where \( t \) is measured in seconds since the ball was thrown. 

12. Find the solutions to the equation \( 0 = 4 + 12 t - 16 t ^ { 2 } \) . 

13. What do the solutions tell us about the tennis ball? 

Answer

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Solución
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