SOLUTION: Let f(x) = 5x^2 +3 and g(x) = 2x^2 + 3x -6. Find (fg)(-1).

Algebra ->  Functions -> SOLUTION: Let f(x) = 5x^2 +3 and g(x) = 2x^2 + 3x -6. Find (fg)(-1).       Log On


   

Question 909849: Let f(x) = 5x^2 +3 and g(x) = 2x^2 + 3x -6. Find (fg)(-1).
Found 2 solutions by ewatrrr, stanbon:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
(fg)(-1)= f(-1)(g(-1) = 8(-7) = -56

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Let f(x) = 5x^2 +3 and g(x) = 2x^2 + 3x -6. Find (fg)(-1).
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f(g(-1)) = f(2(-1)^2+3(-1)-6) = f(-7) = 5(7^2)+3 = 248
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Cheers,
Stan H.
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