For the function F defined by F(x) = x2 – 2x + 4, find F(b+3).

Question

asked Jul 3, 2022 171k views

1 Answer

Dobes · Answer 1 · 2022-07-07T20:52:13+0000

Answer:

$\displaystyle F(b + 3) = b^2 + 4b + 7$

Explanation:

We are given the function:

$\displaystlye F(x) = x^2 - 2x + 4$

And we want to find F(b + 3).

We can substitute:

$\displaystyle F(b + 3) = (b + 3)^2 - 2(b+3) + 4$

Expand:

$\displaystyle = (b^2 + 6b + 9) + (-2b -6) + 4$

Rearrange:

$\displaystyle = (b^2) + (6b-2b) + (9 - 6 + 4)$

Combine like terms. Hence:

$\displaystyle = b^2 +4b + 7$

In conclusion:

$\displaystyle F(b + 3) = b^2 + 4b + 7$