Answer:
Step-by-step:
It takes him 1.4 minutes to read one page.
X^2 + 6x +9
(x+3) (x+3)
x+3 = 0
x = -3
answer: x=-3
No, if you are subtracting a bigger than the one it is being taken from then the answer will be negative. Ex:5-10=-5
Hope this helps:)