mike1016 mike1016

22-09-2016
Mathematics

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what is the sum of sqrt 18 plus sqrt 72

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Аноним Аноним

22-09-2016

18=2*3*3=2*3²
72=2*2*2*3*3=2³ *3²

√18+√72=√(2*3²) +√(2³ * 3²)=3√2 + 3*2√2=3√2 + 6√2=9√2

Answer: √18+√72=9√2

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