The chat room is NOT an appropriate forum to post this question in.

Are you familiar with the chain rule? If so, use it to differentiate .

The maximum value of g(x) on the interval will occur at either one of the endpoints or at a maximum turning point within the interval.

Do you know how to find the x-coordinate of a stationary point using calculus? Do you know how to test the nature of a stationary point? If so, do this. Does g(x) have a maximum turning point on the interval?

Find g(0) and g(10).

Therefore the largest value of g(x) is .......?