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[tex]20 \sqrt{2} = 2 * x + 2 * 3 \sqrt{2}

2 * x = ? [/tex]


Răspuns :

2x=2*3√2-20√2
2x=14√2
x=[tex] \frac{2}{14} [/tex]√2
x=[tex] \frac{2√2}{14√2} [/tex]
Se simplifica √2 cu √2 si [tex] \frac{2}{14} [/tex] =7
Nu stiu sigur daca e bine...:D