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?

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 - drwls, Saturday, January 16, 2010 at 3:02pm

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

algebra 2 - hellogoodbie, Saturday, January 16, 2010 at 3:06pm

where did u get the 4 from?

- algebra 2 -
**bobpursley**, Saturday, January 16, 2010 at 3:45pm
The four came from (x^{2})

two squared is 4

- algebra 2 -
**hellogoodbie**, Saturday, January 16, 2010 at 3:49pm
Wow, I'm so confused. Can somebody just solve this problem step by step please?

- algebra 2 -
**bobpursley**, Saturday, January 16, 2010 at 5:26pm
This is pretty basic. I suggest a tutor.

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