# How do you evaluate the function f(x)=9x^3-x^2+2 for f(2)?

Aug 6, 2017

$70$

#### Explanation:

$f \left(x\right) = 9 {x}^{3} - {x}^{2} + 2$

$f \left(2\right)$ means that we are told that $x = 2$ , and asked to find the value for $f \left(x\right)$, which is also $y$

$f \left(x\right) = 9 {x}^{3} - {x}^{2} + 2$

$f \left(2\right) = 9 {\left(2\right)}^{3} - {\left(2\right)}^{2} + 2$

$f \left(2\right) = 9 \left(8\right) - 4 + 2 = 70$

This gives us the ordered pair $\left(2 , 70\right)$