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Question number 2 plyzzzzzzzzzzz

Answer»

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3 \sqrt{12}  \times 7 \sqrt{15} \\  = 21 \sqrt{<klux>180</klux> }   \\
we know
180=2×2×3×3×5
so ROOT 180= 6ROOT 5
21 \times 6 \sqrt{5}  \\  = 126 \sqrt{5}
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