Calculati:
a) (2-3radical din 2)^2

[tex](2- 3 \sqrt{2})^{2}[/tex] =

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[tex] (a-b)^{2} = a^{2} - 2ab + b^{2} [/tex]
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= [tex] 2^{2} [/tex] - [tex]2 * 3 *\sqrt{2}[/tex] + ([tex] 3^{2} * \sqrt{2} ^{2} [/tex])
= [tex]4- 6 \sqrt{2} +18[/tex] =
= [tex]22- 6 \sqrt{2} [/tex]

[tex](2 - 3\sqrt{2} )^{2} [/tex]
[tex]4 - 12 \sqrt{2} + 18[/tex]
[tex]22 - 12 \sqrt{2} [/tex]
[tex]folosesti \: formula \: (a - b)^{2} = {a}^{2} - 2ab + {b}^{2} [/tex]