√5 x √7 x √15 x √21 in simplified form
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√5×√7×√5×3×√7×3
√5×√7×√5×√3×√7×√3
√5×√5×√7×√7×√3×√3
5×7×3
=105
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√5×√7×√15×√21
=√5×7×15×21
=√11025
=105
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