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22 February, 23:33

Radical 8 plus radical 18

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Answers (1)
  1. 22 February, 23:49
    0
    5√2

    Step-by-step explanation:

    √8 + √18

    We first have to find what is the largest perfect square that goes into √8:

    4 is the largest, so therefore → √8 gives you 2√2:

    Work: √4 * √2 → 2 * √2 → 2√2

    Now we have to find what is the largest perfect square that goes into √18:

    9 is the largest, so therefore → √18 gives you 3√2:

    Work: √9 * √2 → 3 * √2 → 3√2

    Because 2√2 and 3√2 have the same "base" of √2, they can be added together:

    2√2 + 3√2 = 5√2 (The "bases" are to be left alone!)
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