Question

If f(x) = 2x2 + 3x and g(x) = x – 2, what is (f + g)(2)?

Answer 1

by definition, we can write this:
\[\left( {f + g} \right)\left( x \right) = f\left( x \right) + g\left( x \right) = 2{x^2} + 3x + x - 2 = ...\]
please complete

Answer 2

2x squared + 4x-2??

Answer 3

ok! correct!

Answer 4

i have some answer choices

Answer 5

now, please replace x with 2, what do you get?
\[\begin{gathered}
\left( {f + g} \right)\left( x \right) = 2{x^2} + 4x - 2 \hfill \\
\hfill \\
\left( {f + g} \right)\left( 2 \right) = 2 \times {2^2} + 4 \times 2 - 2 = ...? \hfill \\
\end{gathered} \]

Answer 6

16
14
12
10
8 are the choices

Answer 7

okay let me solve

Answer 8

yes!

Answer 9

is 12 correct?

Answer 10

hint:
\[\left( {f + g} \right)\left( 2 \right) = 2 \times {2^2} + 4 \times 2 - 2 = 2 \times 4 + 8 - 2 = ...?\]

Answer 11

2??

Answer 12

I got this:
\[\begin{gathered}
\left( {f + g} \right)\left( 2 \right) = 2 \times {2^2} + 4 \times 2 - 2 = \hfill \\
\hfill \\
= \left( {2 \times 4} \right) + 8 - 2 = 8 + 8 - 2 = 16 - 2 = ...? \hfill \\
\end{gathered} \]

Answer 13

14???

Answer 14

that's right!

Answer 15

thank you soooo much

Answer 16

:)