Homework Help: algebra 2

Posted by hellogoodbie on Saturday, January 16, 2010 at 4:03pm.

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 (x2)

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 - drwls, Saturday, January 16, 2010 at 4:44pm
We just did.

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