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 -
**drwls**, Saturday, January 16, 2010 at 4:40pm
x^2 = 4

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