# How do you evaluate 68 - y^2 for y = 5?

Jul 8, 2015

Replace $y$ with $5$ in the expression and perform the arithmetic to get
$\textcolor{w h i t e}{\text{XXXX}}$$43$
$68 - {y}^{2}$ with $y = 5$
$68 - {5}^{2}$
$\textcolor{w h i t e}{\text{XXXX}}$$= 68 - 25$
$\textcolor{w h i t e}{\text{XXXX}}$$= 43$