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10 December, 04:11

What is the sum of sqrt 18 plus sqrt 72

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  1. 10 December, 04:17
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    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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