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Xradical2-radical8=5radical2

Răspuns :

[tex]x \sqrt{2} - \sqrt{8} = 5 \sqrt{2} [/tex]

[tex]x \sqrt{2} - 2 \sqrt{2} = 5 \sqrt{2} [/tex]

[tex] \sqrt{2} (x - 2) = 5 \sqrt{2} \: | \div \sqrt{2} [/tex]

[tex]x - 2 = 5[/tex]

[tex]x = 5 + 2[/tex]

[tex]x = 7[/tex]