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If f(x) = 2x -­ 4 and g(x) = x^2+3, find each value.

19. (f -­ g)(x)
20. (f • g)(x)

1 Answer

2 votes

Explanation:


(f - g)(x) = f(x) - g(x) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = (2x - 4) - ( {x}^(2) + 3) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 2x - 4 - {x}^(2) - 3 \\ \red{ \boxed{\therefore (f - g)(x) = - {x}^(2) + 2x - 7}}

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