# algebra 2

posted by .

How is this problem done?

IF f(x)=2x^2-8x-3 FIND f(-2)

algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm
Put in for x the value -2, and compute f(-2)

algebra 2 - hellogoodbie, Saturday, January 16, 2010 at 1:47pm
so is the answer f=21/2? if that is right, thank you bobpursley

• algebra 2 -

The answer has to be an integer. In this case, it is 2*4 - 8*(-2) - 3 = 21

• algebra 2 -

where did u get the 4 from?

• algebra 2 -

x^2 = 4

## Similar Questions

1. ### physics - another question

Sam is sitting in her fishing boat watching a trout swim below the surface. She guesses the apparent depth of the trout at 2.0m. She estimates that her eyes are about 1.0 m above the water's surface, and that the angle at which she's …
2. ### physics - last question

Sam is sitting in her fishing boat watching a trout swim below the surface. She guesses the apparent depth of the trout at 2.0m. She estimates that her eyes are about 1.0 m above the water's surface, and that the angle at which she's …
3. ### algebra 2

How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and compute f(-2) algebra 2 - hellogoodbie, Saturday, January 16, 2010 at 1:47pm so is the
4. ### algebra 2

Posted by hellogoodbie on Saturday, January 16, 2010 at 2:59pm. How is this problem done?
5. ### algebra 2

Posted by hellogoodbie on Saturday, January 16, 2010 at 3:24pm. Posted by hellogoodbie on Saturday, January 16, 2010 at 2:59pm. How is this problem done?
6. ### physics

light travels from ethanol intro crown glass. what's the brewster angle in this situation?
7. ### physics

Posted by michelle quendarsv on Saturday, November 20, 2010 at 3:55pm. if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass?
8. ### physics

Posted by michelle quendarsv on Saturday, November 20, 2010 at 5:26pm. Posted by michelle quendarsv on Saturday, November 20, 2010 at 3:55pm. if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass?
9. ### Physics

if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass?
10. ### Physics

if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass?

More Similar Questions