SOLUTION: f(x)=2|x|+3x find each of the following f(-2) and f(-x)

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Question 1151450: f(x)=2|x|+3x find each of the following f(-2) and f(-x)
Found 2 solutions by Alan3354, josmiceli:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=2|x|+3x find each of the following f(-2)
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Wherever you see x, replace it with -2.
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and f(-x)
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Wherever you see x, replace it with -x.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+f%28x%29+=+2%2Aabs%28+x+%29+%2B+3x+
+f%28+-2+%29+=+2%2A2+%2B+3%2A%28+-2+%29+
+f%28+-2+%29+=+4+-+6+
+f%28+-2+%29+=+-2+
----------------------
+f%28+-x+%29+=+2%2Aabs%28+-x+%29+%2B+3%2A%28+-x+%29+
+f%28+-x+%29+=+2x+-+3x+
+f%28+-x+%29+=+-x+
-----------------------
Here's the plot:
+graph%28+400%2C+400%2C+-10%2C+10%2C+-10%2C+10%2C+2%2Aabs%28+x+%29+%2B+3x+%29+