| Ipatia | Data: Joi, 09.07.2015, 06:50 | Mesaj # 1 |
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| $<a href="http://www.codecogs.com/eqnedit.php?latex=\sqrt{2x+3}=x\Leftrightarrow&space;\left\{\begin{matrix}&space;x\geqslant&space;0\\&space;x^{2}=2x+3&space;\end{matrix}\right.&space;\Leftrightarrow&space;\left\{\begin{matrix}&space;x\geqslant&space;0\\&space;x^{2}-2x-3=0&space;\end{matrix}\right.\Leftrightarrow&space;\left\{\begin{matrix}&space;x\geqslant&space;0&space;\\&space;\left\[]\begin{matrix}&space;x=3&space;\\&space;x=-1&space;\end{matrix}\right.&space;\end{matrix}\right.&space;\Rightarrow&space;x=3" target="_blank"><img src="http://latex.codecogs.com/gif.latex?\sqrt{2x+3}=x\Leftrightarrow&space;\left\{\begin{matrix}&space;x\geqslant&space;0\\&space;x^{2}=2x+3&space;\end{matrix}\right.&space;\Leftrightarrow&space;\left\{\begin{matrix}&space;x\geqslant&space;0\\&space;x^{2}-2x-3=0&space;\end{matrix}\right.\Leftrightarrow&space;\left\{\begin{matrix}&space;x\geqslant&space;0&space;\\&space;\left\[]\begin{matrix}&space;x=3&space;\\&space;x=-1&space;\end{matrix}\right.&space;\end{matrix}\right.&space;\Rightarrow&space;x=3" title="\sqrt{2x+3}=x\Leftrightarrow \left\{\begin{matrix} x\geqslant 0\\ x^{2}=2x+3 \end{matrix}\right. \Leftrightarrow \left\{\begin{matrix} x\geqslant 0\\ x^{2}-2x-3=0 \end{matrix}\right.\Leftrightarrow \left\{\begin{matrix} x\geqslant 0 \\ \left\[]\begin{matrix} x=3 \\ x=-1 \end{matrix}\right. \end{matrix}\right. \Rightarrow x=3" /></a>$$IMAGE1$
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