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X^2 - xy if x = 8 and y = -3Evaluate each expression given the variable replacement

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Given:


\begin{gathered} x^2-xy \\ \text{and} \\ x=8 \\ y=-3 \end{gathered}

Find: Evaluate the expression:

Sol:.


\begin{gathered} x^2-xy \\ x=8 \\ y=-3 \end{gathered}

Put the value of "x" and "y" then:


\begin{gathered} =x^2-xy \\ =(8)^2-(8)(-3) \\ =64+24 \\ =88 \end{gathered}

So the value of expression is 88

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