5 5 5(3√2-1) -5(3√2+1) 15√2-5-15√2-5
_______ - _______= __________________=_____________=
3√2+1 3√2-1 (3√2+1)(3√2-1) (3√2)²-²1²
=-10/(18-1)=-10/17
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5 5 5(3√2-1) -5(3√2+1) 15√2-5-15√2-5
_______ - _______= __________________=_____________=
3√2+1 3√2-1 (3√2+1)(3√2-1) (3√2)²-²1²
=-10/(18-1)=-10/17