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    square root of 80

    0  Views: 413 Answers: 1 Posted: 12 years ago

    1 Answer

    square root of 80 =


    Find a perfect square of 80 > 16 x 5 = 80


    square root of 16 x 5 >  square root of 16 square root of 5


    Answer: 4, root 5


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    Example:




      • <font size="2" color="green" face="Arial">Simplify sqrt[75]</font>




      <font size="2" color="black" face="Arial">sqrt[75] = sqrt[3 * 25] = sqrt[25] sqrt[3] = 5 sqrt[3]</font>


      <font size="2" color="black" face="Arial">This answer is pronounced as "five, root three". It is proper form to put the radical at the end of the expression. Not only is "sqrt[3]5" non-standard, it is very hard to read, especially when hand-written. And write neatly, because "5 sqrt[3], or 'five times the square root of three'" is not the same as "5th-rt[3], or 'the fifth root of three'".</font>


      <font size="2" color="black" face="Arial">You don't have to </font><font size="2" face="Arial">factor</font><font size="2" color="black" face="Arial"> the radicand all the way down to prime numbers when simplifying. As soon as you see a pair of factors or a perfect square, you've gone far enough.</font>


       


       



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