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Quadratic equations describe the motion of a baseball after it connects with a bat, and the acceleration of gravity at the Earth's orbit.

#### Challenge Quizzes

What is the root of the quadratic equation

$x^2 + 6 x +9 = 0?$

What are the roots of the quadratic equation

$x^2 -2 x -48 = 0?$

What are the roots of the quadratic equation

$x^2 - 2 x -5 = 0?$

Two taps $$A$$ and $$B$$ can fill a swimming pool in 3 hours. If turned on alone, it takes tap A 4 hours less than tap B to fill the same pool. How many hours does it take tap A to fill the pool? (Round your answer to three decimals places.)

What are the roots of the quadratic equation

$0.5x^2 + 0.6 x -0.2 = 0?$

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