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romanna [79]
3 years ago
11

Let $f(x) = 4x - 7$, $g(x) = (x + 1)^2$, and $s(x) = f(x) + g(x)$. What is $s(3)$?

Mathematics
2 answers:
creativ13 [48]3 years ago
7 0

s(3)=4(3)-7+(3+1)^2

s(3)=12-7+16

s(3)=21

anygoal [31]3 years ago
5 0

Answer:

21

Step-by-step explanation:

We find that  s(x) = 4x - 7 + (x + 1)^2. Expanding, we get s(x) = x^2 + 6x - 6. Plugging in x = 3, we have s(3) = 3^2 + 6 x 3 - 6 = 21.

Alternatively, we can compute that f(3) = 5 and g(3) = 16, so  s(3) = f(3) + g(3) = 21.

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trapecia [35]
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Explanation:

1) polynomials given:

 f(x) = x/2 - 2 and g(x) = 2x^2 + x - 3

2) question: find (f + g) (x)

That means that f(x) + g(x), so you have to add up the two polynomials given.

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That is the option d.


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3 years ago
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Gala2k [10]

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