at 8am the temperature was 3 degrees below zero. by 9 am the temperature had gone up 6 degrees, but by 10 am it had gone down again 4 degrees. what was the temperature at 10 am?

-1

Step-by-step explanation:

-3 + 6 = 3

3 - 4 = -1

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.