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earnstyle [38]
3 years ago
15

2√7 times 3 √21 simply

Mathematics
1 answer:
ElenaW [278]3 years ago
8 0
21=3*7
(2√7)(3√(3*7)=6√(3*7²)=6*7(√3)=42√3

Answer: (2√7)(3√21)=42√3
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