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what is the square root of 81?
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81/9=?
its 9
81 is a perfect square
@surd seriously? direct answers?
oh sorry
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explain it now :P
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81=9x 9
is that enuf ??
there is another solution
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Its 9 because 81 is a perfect square therefore a number multiplied by itself is a perfect square http://www.mathwarehouse.com/arithmetic/numbers/list-of-perfect-squares.php @UnkleRhaukus i dont think so
\[-9 \times-9 =\quad\dots\]
Thats smart :)
Squaring which POSITIVE number returns 81? That is the square root of 81.
*principal
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its 9
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