SOLUTION: Find (f - g)(-5) when f(x) = 5x2 - 7 and g(x) = x + 4
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Question 888219: Find (f - g)(-5) when f(x) = 5x2 - 7 and g(x) = x + 4
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Find (f - g)(-5) when f(x) = 5x2 - 7 and g(x) = x + 4
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First compute f(-5)
f(x) = 5x^2 - 7
f(-5) = 5(-5)^2 - 7
f(-5) = 5(25) - 7
f(-5) = 125 - 7
f(-5) = 118
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Then find g(-5)
g(x) = x + 4
g(-5) = -5 + 4
g(-5) = -1
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Use them both to find (f - g)(-5)
(f - g)(-5) = f(-5) - g(-5)
(f - g)(-5) = 118 - (-1)
(f - g)(-5) = 118 + 1
(f - g)(-5) = 119
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