Question

how do you find the max height for y = -5x^2 + 24t

Answer 1

y = -5x^2 + 24t o ry = -5x^2 + 24x ?

Answer 2

oh sorry my bad it's y = -5t^2 + 24t

Answer 3

what, dont you do completing the square?

Answer 4

ok lets do it
factor -5

Answer 5

so -5(t^2 + 24t)

Answer 6

no -5(t^2-24/5t)
-5(t^2-4.8t)

Answer 7

-5(t^2-4.8t +(2.4^2)-(2.4^2))

Answer 8

-5(t^2-4.8t +(2.4^2)-(2.4^2))
=-5[(t-2.4)^2-2.4^2}
max obtain by t=2.4