saturnspaceagent saturnspaceagent
  • 11-11-2020
  • Mathematics
contestada

If f(x)= -4x + 3 and g(x) = 3x² + 2x - 4 find (f+g)(x)

If fx 4x 3 and gx 3x 2x 4 find fgx class=

Respuesta :

xKelvin
xKelvin xKelvin
  • 11-11-2020

Answer:

A

Step-by-step explanation:

We have the two functions:

[tex]f(x)=-4x+3\text{ and } g(x)=3x^2+2x-4[/tex]

And we want to find (f+g)(x).

Note that this is the same thing to f(x)+g(x). Therefore:

[tex]\begin{aligned} (f+g)(x)&=f(x)+g(x) \\ &=(-4x+3)+(3x^2+2x-4) \end{aligned}[/tex]

We simply substituted them for their equations.

Simplify. Combine like terms:

[tex]=(3x^2)+(-4x+2x)+(3-4)[/tex]

Add:

[tex]=3x^2-2x-1[/tex]

Hence, our answer is A.

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