Oblicz x-y , x2/y dla x=1-√2 i y* 2+3√2.
x-y=1-√2-2-3√2=-1-4√2
x²/y=(1-√2)²/(2+3√2)=(1-2√2+2)(2-3√2)/4-18=(3-2√2)(2-3√2)/-14=
(6-9√2-4√2+12)/-14=(-18+13√2)/14
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Oblicz x-y , x2/y dla x=1-√2 i y* 2+3√2.
x-y=1-√2-2-3√2=-1-4√2
x²/y=(1-√2)²/(2+3√2)=(1-2√2+2)(2-3√2)/4-18=(3-2√2)(2-3√2)/-14=
(6-9√2-4√2+12)/-14=(-18+13√2)/14