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22 September, 20:20

What is the sum of sqrt - 2 and sqrt - 18

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  1. 22 September, 20:25
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    4i sqrt (2)

    Step-by-step explanation:

    sqrt (-2) + sqrt (-18)

    We know sqrt (ab) = sqrt (a) sqrt (b)

    sqrt (-1) sqrt (2) + sqrt (9) sqrt (-2)

    sqrt (-1) sqrt (2) + sqrt (9) sqrt (2) sqrt (1)

    We know the sqrt (-1) is equal to i

    i sqrt (2) + 3 sqrt (2) i

    i sqrt (2) + 3i sqrt (2)

    4i sqrt (2)
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