Either one at any given time could be equal to zero. So
x + 2 = 0
x = - 2
x - 18 = 0
x = 18
I've enclosed a graph of this so you can see that the answers I've given are the ones expected.
Answer:
what is the question please explain
Answer:
2 relative maxima and minima
(2, 6.2) = maxima
(0, -4) = minima
*tell me if I got this wrong
The answer is 6.875 ish. not exact