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y = -5t^2 + 30t + 25

y = 0, SOLVE FOR t
^2 = squared

1 Answer

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Answer: t^2 = 36 or 1

Step-by-step explanation: Divide everything by -5, and get t^2 -6t -5=0, Factoring is (t-6)(t+1), so t=6 or t=-1. Both squared are 36 and 1 so either of these could be the answer. Hope this helps!

User TwiceYuan
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