Salut! ⚛
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[tex](\sqrt{2}+1)^2 - (\sqrt{2}-1)^2[/tex]
Folosim formula (a - b)^2 = a^2 - 2ab + b^2:
[tex]2+2\sqrt{2} + 1 - (2-2\sqrt{2}+1)[/tex]
[tex]2 + 2\sqrt{2}+1-3+2\sqrt{2}[/tex]
[tex]0+2\sqrt2 + 2\sqrt2 = \boxed{4\sqrt2}[/tex]
Raspuns final: [tex]\boxed{4\sqrt2}[/tex]
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Luke48
