1. If and , then at is?

I got

at

However, the correct answer is -2

2. If , how many numbers in the interval [-2,3] satisfy the conclusion of the Mean Value Theorem?

f is always negative on the interval so I got rid of the absolute value signs and multiplied it by -1.

Then I differentiated and got:

x=.321, -2.141, 1.820

interval is [-2,3] so c=.321, 1.820

The thing is the answer is three numbers...

Any help is greatly appreciated