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Find (f+g)(x) if f(x)=-3x^2*x2-3 and g(x) = 2x^2 -3x+4

A. (f+g)(x)=-5x^2+5x-7
B.(f+g)(x)=5x^2-5x+7
C.(f+g)(x)=x^2+x-1
D.(f+g)(x)=-x^2-x+1

Respuesta :

Answer:

f (x) = 5x - 7, g (x) = [tex]x + 5/7[/tex]

Step by step:

Set up the composite result function.

g(f(x)) Evaluate g(5x − 7) by substituting the value of f into g.

g(5x − 7) = (5x − 7) + 57 Add −7 and 5.

g(5x − 7) = 5x − 27