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Real Numbers — Maths STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9MathsReal Numbers1 Mark
Question
Multiply and write the answer in the simplest form : $3 \sqrt{8} \times \sqrt{5}$
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Answer

$\begin{aligned} 3 \sqrt{8} \times \sqrt{5} & =3 \times \sqrt{4 \times 2} \times \sqrt{5} \\ & =3 \times 2 \sqrt{2} \times \sqrt{5} \\ & =6 \sqrt{10} \\ \therefore \quad 3 \sqrt{8} \times \sqrt{5} & =6 \sqrt{10}\end{aligned}$

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