Solution 3.1:2c
From Förberedande kurs i matematik 1
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- | {{ | + | The expression <math>-3^2</math> means <math>-(3^2)= -9</math> (and not <math>(-3)^2</math>) and so we have that |
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- | { | + | {{Displayed math||<math>\sqrt{-3^2} = \sqrt{-9}\,\textrm{.}</math>}} |
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+ | The root expression <math>\sqrt{-9}</math> is not defined because there is no number which, when multiplied by itself, gives <math>-9</math>. |
Current revision
The expression \displaystyle -3^2 means \displaystyle -(3^2)= -9 (and not \displaystyle (-3)^2) and so we have that
\displaystyle \sqrt{-3^2} = \sqrt{-9}\,\textrm{.} |
The root expression \displaystyle \sqrt{-9} is not defined because there is no number which, when multiplied by itself, gives \displaystyle -9.