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steve816

  • one year ago

Easy quick question!

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  1. steve816
    • one year ago
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    |dw:1444203627104:dw|

  2. steve816
    • one year ago
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    I feel stupid not knowing this, but I always don't know which term to square

  3. FireKat97
    • one year ago
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    \[(a \sqrt{b})^2 = (a)^2.(\sqrt{b})^2 = a^2.b\]

  4. steve816
    • one year ago
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    Would the answer be 32?

  5. FireKat97
    • one year ago
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    The square root and the square cancel because a square root can also be write-in the form of \[(b)^{1/2}\] so when you square that you get \[(b)^{\frac{ 1 }{ 2 } . 2}\] and according to index laws the 1/2 and 2 cancel so you just get \[(b)^1 \] which is just (b)

  6. FireKat97
    • one year ago
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    yeah that correct

  7. steve816
    • one year ago
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    thanks mate

  8. FireKat97
    • one year ago
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    no problem :)

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spraguer (Moderator)
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