Question

Question number 2 plyzzzzzzzzzzz

Answer 1

2.
$3 \sqrt{12} \times 7 \sqrt{15} \\ = 21 \sqrt{180 }$
we know
180=2×2×3×3×5
so root 180= 6root 5
$21 \times 6 \sqrt{5} \\ = 126 \sqrt{5}$
hope helps
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