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How do you evaluate $68 - y^{2}$ $68 - y^2$ for y = 5?

1 Answer

Jul 8, 2015

Replace $y$ $y$ with $5$ $5$ in the expression and perform the arithmetic to get
$XXXX$ $color(white)("XXXX")$ $43$ $43$

Explanation:

$68 - y^{2}$ $68-y^2$ with $y = 5$ $y=5$
becomes
$68 - 5^{2}$ $68 -5^2$
$XXXX$ $color(white)("XXXX")$ $= 68 - 25$ $=68 - 25$
$XXXX$ $color(white)("XXXX")$ $= 43$ $= 43$

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