7. The domain for f(x) and g(x) is the set of all real numbers.
Let f(x) = 3x + 5 and g(x) = x?.
Find (f + g)(x).
3x2 + 5
x3 + 5
x2 + 3x + 5
3x3 + 5x2
HELP PLS

option 3.

x² + 3x + 5

Step-by-step explanation:

(f+g)x = f(x)+ g(x)

= 3x + 5 + x²

upon rearranging the terms

= x²+ 3x + 5

thT Is option 3.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

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