waecmaths question:
Evaluate ${{\left( {{64}^{\tfrac{1}{2}}}+{{125}^{\tfrac{1}{3}}} \right)}^{2}}$
Option A:
121
Option B:
144
Option C:
169
Option D:
196
waecmaths solution:
$\begin{align} & {{({{64}^{\tfrac{1}{2}}}+{{125}^{\tfrac{1}{3}}})}^{2}}=(\sqrt{64}+\sqrt[3]{125}) \\ & ={{(8+5)}^{2}} \\ & ={{13}^{2}}=169 \end{align}$
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