Datrys ((sqrt{2}-1+{left(2sqrt{2}-1right)}^2+2sqrt{2})

$$(( \sqrt{ 2 } -1+ { \left(2 \sqrt{ 2 } -1 \right) }^{ 2 } +2 \sqrt{ 2 } )$$

Enrhifo

$$8-\sqrt{2}\approx 6.585786438$$

Camau Ateb

Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(2\sqrt{2}-1\right)^{2}.

$$\sqrt{2}-1+4\left(\sqrt{2}\right)^{2}-4\sqrt{2}+1+2\sqrt{2}$$

Sgwâr \sqrt{2} yw 2.

$$\sqrt{2}-1+4\times 2-4\sqrt{2}+1+2\sqrt{2}$$

Lluosi 4 a 2 i gael 8.

$$\sqrt{2}-1+8-4\sqrt{2}+1+2\sqrt{2}$$

Adio 8 a 1 i gael 9.

$$\sqrt{2}-1+9-4\sqrt{2}+2\sqrt{2}$$

Adio -1 a 9 i gael 8.

$$\sqrt{2}+8-4\sqrt{2}+2\sqrt{2}$$

Cyfuno \sqrt{2} a -4\sqrt{2} i gael -3\sqrt{2}.

$$-3\sqrt{2}+8+2\sqrt{2}$$

Cyfuno -3\sqrt{2} a 2\sqrt{2} i gael -\sqrt{2}.

$$-\sqrt{2}+8$$