I've already factored it out to f(t) = -16(t - 1)(t - 5), but I'm unsure what to do from there.
First there is no x in the equation. Secondly if there is, then the equation will be
f(x) = - 16(x - 1)(x - 5)
y = - 16(x - 1)(x - 5)
To find x intercept, we put y = 0 then
0 = - 16(x - 1)(x - 5)
(x - 1)(x - 5) = 0
x - 1 = 0 , x - 5 = 0
x = 1 , x = 5
Hence x intercepts are 1 and 5
When I graphed the equation on Desmos, it showed that the x-intercepts were -5 and 1.
f(t) = -16t^2 - 64t + 80
f(t) = - 16(t^2 + 4t - 5)
f(t) = - 16(t^2 - t + 5t - 5)
f(t) = - 16(t(t - 1) + 5(t - 1))
f(t) = - 16(t - 1)(t + 5)
So as I have done the factorization and I see that you've done wrong factorization. So
The graph is right. And using the factored term, the x intercepts are 1 and - 5.
Yep! Got it.
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