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12-10-2018
Mathematics

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if f(x)=-4x^2-6x-1 and g(x)=-x^2-5x+3 find (f – g)(x)

if fx4x26x1 and gxx25x3 find f gx class=

Respuesta :

13-10-2018

[tex]f(x)=-4x^2-6x-1\\\\g(x)=-x^2-5x+3\\\\(f-g)(x)=f(x)-g(x)=(-4x^2-6x-1)-(-x^2-5x+3)\\\\=-4x^2-6x-1+x^2+5x-3=(-4x^2+x^2)+(-6x+5x)+(-1-3)\\\\=-3x^2-x-4\to\boxed{B.}[/tex]

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