Datrys 2sqrt{18}+5sqrt{50}-4sqrt{2}

$$2 \sqrt{ 18 } +5 \sqrt{ 50 } -4 \sqrt{ 2 }$$

Enrhifo

$$27\sqrt{2}\approx 38.183766184$$

Camau Ateb

Ffactora 18=3^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{3^{2}\times 2} fel lluoswm ail israddau \sqrt{3^{2}}\sqrt{2}. Cymryd isradd 3^{2}.

$$2\times 3\sqrt{2}+5\sqrt{50}-4\sqrt{2}$$

Lluosi 2 a 3 i gael 6.

$$6\sqrt{2}+5\sqrt{50}-4\sqrt{2}$$

Ffactora 50=5^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{5^{2}\times 2} fel lluoswm ail israddau \sqrt{5^{2}}\sqrt{2}. Cymryd isradd 5^{2}.

$$6\sqrt{2}+5\times 5\sqrt{2}-4\sqrt{2}$$

Lluosi 5 a 5 i gael 25.

$$6\sqrt{2}+25\sqrt{2}-4\sqrt{2}$$

Cyfuno 6\sqrt{2} a 25\sqrt{2} i gael 31\sqrt{2}.

$$31\sqrt{2}-4\sqrt{2}$$

Cyfuno 31\sqrt{2} a -4\sqrt{2} i gael 27\sqrt{2}.

$$27\sqrt{2}$$