txdi08
txdi08
17-04-2018
Mathematics
contestada
Please help, I can't remember any of this.
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Serpentiel
Serpentiel
17-04-2018
The correct answer is the third one.
However, i would suggest you to remember the following simple rule:
[tex]a^{2}=b \newline a=\pm\sqrt{b}.[/tex]
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