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Liana started to evaluate the function [tex]f(x) = 2x^2 - 3x + 7[/tex]. What is the value of the function when [tex]x = 2[/tex]?

[tex]
\begin{aligned}
f(x) & = 2(2)^2 - 3(2) + 7 \\
& = 2(4) - 3(2) + 7 \\
& = 8 - 6 + 7 \\
& = 9
\end{aligned}
[/tex]

A. 9
B. 10
C. 16
D. 17


Sagot :

Let's evaluate the function step-by-step to find [tex]\( f(2) \)[/tex] for the given function [tex]\( f(x) = 2x^2 - 3x + 7 \)[/tex].

Given:
[tex]\[ f(x) = 2x^2 - 3x + 7 \][/tex]

Step-by-Step Evaluation:

1. Substitute [tex]\( x = 2 \)[/tex] into the function:
[tex]\[ f(2) = 2(2)^2 - 3(2) + 7 \][/tex]

2. Evaluate the exponent:
[tex]\[ (2)^2 = 4 \][/tex]
So, the expression becomes:
[tex]\[ f(2) = 2(4) - 3(2) + 7 \][/tex]

3. Next, perform the multiplication:
[tex]\[ 2(4) = 8 \quad \text{and} \quad 3(2) = 6 \][/tex]
Now the expression is:
[tex]\[ f(2) = 8 - 6 + 7 \][/tex]

4. Finally, perform the addition and subtraction:
[tex]\[ 8 - 6 = 2 \][/tex]
[tex]\[ 2 + 7 = 9 \][/tex]

Therefore, the value of the function when [tex]\( x = 2 \)[/tex] is:
[tex]\[ f(2) = 9 \][/tex]

Thus, the answer is [tex]\( 9 \)[/tex].