Solution 3.1:2c

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m (Lösning 3.1:2c moved to Solution 3.1:2c: Robot: moved page)
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The expression
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<center> [[Image:3_1_2c.gif]] </center>
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<math>-\text{3}^{\text{2 }}</math>
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means
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<math>-\left( \text{3} \right)^{\text{2}}\text{ }=-\text{9 }</math>
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(and not
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<math>\left( -\text{3} \right)^{\text{2}}</math>
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) and so we have
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The root expression
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<math>\sqrt{-9}</math>
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is not defined because there is no number which, when multiplied by itself, gives
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<math>-\text{9}</math>.

Revision as of 10:47, 22 September 2008

The expression \displaystyle -\text{3}^{\text{2 }} means \displaystyle -\left( \text{3} \right)^{\text{2}}\text{ }=-\text{9 } (and not \displaystyle \left( -\text{3} \right)^{\text{2}} ) and so we have


The root expression \displaystyle \sqrt{-9} is not defined because there is no number which, when multiplied by itself, gives \displaystyle -\text{9}.

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