`h(t) = -10t^2+500t+9050`
`First take -10 out of the expression. h(t) = -10(t^2-50t-905)`
Now we have to complete a square in the left side.
Look at following expression.
`(t-a)^2 = t^2-2at+a^2`
Consider` t^2-50t-905 ` with the right side of the above. Compare the...
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