rooster6 rooster6

24-01-2018
Mathematics

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For f(x) = 4x + 1 and g(x) = x2 – 5, find (f – g)(x). A. –x2 + 4x – 4 B. x2 – 4x – 6 C. –x2 + 4x + 6 D. 4x2 – 19

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iiKajanaii iiKajanaii

24-01-2018

The answer is
[tex] - {x}^{2} + 5[/tex]

[tex]f = 4x + 1 \\ g = {x}^{2} - 5 \\ f - g = \\( 4x + 1) - ( {x}^{2} + 4x - 4) \\ 4x + 1 - {x}^{2} - 4x + 4 \\ [/tex]
[tex]- {x}^{2} + 4x - 4x + 1 + 4 \\ - {x}^{2} + 5 [/tex]

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