2*x^2= 18

Hallo Anonymous 1 und 2,

ich möchte euch einmal zeigen, wie man Wurzeln schreiben kann:

Ich verwende   Math Formula e.g.   ( oben, untere Zeile )

anklicken  und  Wurzel  mit  sqrt(9) eingeben.

$${\mathtt{2}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}} = {\mathtt{18}}$$       ;     $${{\mathtt{x}}}^{{\mathtt{2}}} = {\frac{{\mathtt{18}}}{{\mathtt{2}}}} = {\mathtt{9}}$$       ;    $${\mathtt{x}} = {\sqrt{{\mathtt{9}}}} = {\mathtt{3}}$$     ( x= +3  oder  x= -3 )

Mit  Calculation e.g.

$${\mathtt{2}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}} = {\mathtt{18}} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = -{\mathtt{3}}\\ {\mathtt{x}} = {\mathtt{3}}\\ \end{array} \right\}$$         

Gruß radix !

2x^2=18 /÷2

x^2=9/ Wurzel

x= Wurzel aus 9 =3