SOLUTION: I'm doing functions and need some help. the book I am using is 12th edition Algebra and Trig with analytical geometry by Swokowski and Cole. the homework is page 190-192 #3-45 by

Question 498372: I'm doing functions and need some help. the book I am using is 12th edition Algebra and Trig with analytical geometry by Swokowski and Cole. the homework is page 190-192 #3-45 by 3's.
-thanks
if f(x)= sqrt(x-4-3x), find f(4), f(8), and f(13)
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
if f(x)= sqrt(x-4-3x), find f(4), f(8), and f(13)
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Sub the values for x:
f(x) = sqrt(-4-2x)
f(4) = sqrt(-4-2*4) = sqrt(-12) = 2sqrt(-3)
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f(8) = sqrt(-4-2*8) = sqrt(-20) etc

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