How do you evaluate $f (x) = x^{2} - 3 x + 1$ $f(x)=x^2-3x+1$ for $f (5)$ $f(5)$ ?

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How do you evaluate $f (x) = x^{2} - 3 x + 1$ $f(x)=x^2-3x+1$ for $f (5)$ $f(5)$ ?

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Answer 1 · 2016-09-25T13:10:52

11

Explanation:

To evaluate f(5) substitute x = 5 into f(x).

$f (5) = {(5)}^{2} - (3 \times 5) + 1$ $f(color(red)(5))=(color(red)(5))^2-(3xxcolor(red)(5))+1$

$\Rightarrow f (5) = 25 - 15 + 1 = 11$ $rArrf(5)=25-15+1=11$

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How do you evaluate $f (x) = x^{2} - 3 x + 1$ $f(x)=x^2-3x+1$ for $f (5)$ $f(5)$ ?

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How do you evaluate $f (x) = x^{2} - 3 x + 1$ $f(x)=x^2-3x+1$ for $f (5)$ $f(5)$ ?