waecmaths question:
Simplify: $\sqrt{12}(\sqrt{48}-\sqrt{3})$
Option A:
18
Option B:
16
Option C:
14
Option D:
12
waecmaths solution:
$\begin{align} & \sqrt{12}(\sqrt{48}-\sqrt{3})=\sqrt{4\times 3}(\sqrt{16\times 3}-\sqrt{3}) \\ & =2\sqrt{3}(4\sqrt{3}-\sqrt{3}) \\ & =2\sqrt{3}(3\sqrt{3}) \\ & =6\times 3=18 \end{align}$
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