anonymous
  • anonymous
If f(x)=x^2+3x-4, find the value of f(-4). Show all work.
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
okay all u do is plug in -4 for all x's
anonymous
  • anonymous
so -4^2 is what? 16
anonymous
  • anonymous
now add 3 X -4 which is 12 so 12+16 is what? 28

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anonymous
  • anonymous
now subtract 4 from 28 which is ur final answer 24
anonymous
  • anonymous
But the 12 would be negative?
anonymous
  • anonymous
yes sorry
anonymous
  • anonymous
So would it be 0???
anonymous
  • anonymous
so now its -12+16 than take that and subtract 4
anonymous
  • anonymous
yes the answer is 0 good job!

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