Question

4. Evaluate : (a)
$\sqrt{98 \times 128}$
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Answer 1

Step-by-step explanation:

$\sqrt{98 \times 128} \\ \\ = 7 \sqrt{2} \times 2 \sqrt{2} \\ \\ = 14 \times 2 \\ = 28 \\ \\ therefore \: answer \: is \: 28$

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