# If f(x)=x^2-5x+1, then f(-3) is __?

## A. $- 5$ B. $10$ C. $25$ D. $- 3$

Mar 6, 2017

C $25$

#### Explanation:

As $f \left(x\right) = {x}^{2} - 5 x + 1$

$f \left(- 3\right) = {\left(- 3\right)}^{2} - 5 \times \left(- 3\right) + 1$

= $9 - \left(- 15\right) + 1$

= $9 + 15 + 1$

= $25$