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The function f(x)=-2x^2+12x+32 models the approximate height of an object t seconds after it is launched. How many seconds does it take the object to hit the ground?

1 Answer

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To find the ground-hitting point (the zeroes of the function), factor.


-2(x^2-6x-8)

2(x-4)(x-2)=0

x=4,x=2

The ball will hit the ground 4 seconds after throwing.
User Alfoks
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