SOLUTION: Given that f(x)= x2(squared) - 3 and g(x) 2x +1, find each of the following if it exists. 3. (f-g)(-1) 7. (fg)(-1/2)

Algebra ->  Functions -> SOLUTION: Given that f(x)= x2(squared) - 3 and g(x) 2x +1, find each of the following if it exists. 3. (f-g)(-1) 7. (fg)(-1/2)      Log On


   

Question 1107796: Given that f(x)= x2(squared) - 3 and g(x) 2x +1, find each of the following if it exists.
3. (f-g)(-1)
7. (fg)(-1/2)
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
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Given that f(x)= x2(squared) - 3 and g(x) 2x +1, find each of the following if it exists.
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Those are f(x)=x^2-3 and g(x)=2x+1.
Site render tagging shows them, f%28x%29=x%5E2-3%2C+and%2C+g%28x%29=2x%2B1.


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(f-g)(-1)
and
(fg)(-1/2)
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Each of those means f%28-1%29-g%28-1%29
and
f%28-1%2F2%29%2Ag%28-1%2F2%29.

Just make the substitutions and evaluate.