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    • Thread Starter

    How do you get 5√33 when you simplify √15 x √55???

    (Original post by Chelsea12345)
    How do you get 5√33 when you simplify √15 x √55???
    Use your surd rules then proceed to simplify inside the root. You should be looking to factor out a square number which square roots nicely.

    Otherwise, break down the roots into roots of primes then simplify at the end.

    (Original post by Chelsea12345)
    How do you get 5√33 when you simplify √15 x √55???
    you first simplify the
    √15 x √55
    soo what 15 goes in to? 5 * 3
    do the same with 55
    then you should end up with two 5s and something
    the 5 goes outside and the number you get will go inside
    try it :yy:

    √15 x √55 = √825

    √825 = √33 x 25

    √25 = 5

    You put that outside the sqrt symbol since it has been squared: 5√33

    Since 33 cannot be factored and squared any more, this is the simplest form.

    There's 155 inside, then 5 goes outside to the front, then we bring the 11 over to the other side. Finally, we pull out the 10. What's left?
    • Thread Starter

    Thankyou all of you! i get it now
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