SOLUTION: let f(x)=|x|+2x. find f(-2) thank you

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Question 118327: let f(x)=|x|+2x. find f(-2)

thank you
Found 2 solutions by stanbon, jim_thompson5910:
Answer by stanbon(48558) About Me  (Show Source):
You can put this solution on YOUR website!
let f(x)=|x|+2x. find f(-2)
f(-2) = |-2|+2*-2
f(-2) = 2-4 = -2
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Cheers,
Stan H.

Answer by jim_thompson5910(21685) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=abs%28x%29%2B2x Start with the given function


f%28-2%29=abs%28-2%29%2B2%28-2%29 Plug in x=-2


f%28-2%29=2%2B2%28-2%29 Take the absolute value of -2 to get 2


f%28-2%29=2-4 Multiply 2 and -2 to get -4


f%28-2%29=-2 Subtract