How do you evaluate a^2-8a+5 when a=6?

Jul 30, 2016

-7

Explanation:

You have ${a}^{2} - 8 a + 5$
Substitute $a = 6$ inside all the $a$'s.
${6}^{2} - 8 \left(6\right) + 5$
Reduce the equation:
$36 - 48 + 5$
We get $- 7$.