Datrys (4sqrt{2}-sqrt{3})(2sqrt{2}+5sqrt{3})=

$$( 4 \sqrt { 2 } - \sqrt { 3 } ) ( 2 \sqrt { 2 } + 5 \sqrt { 3 } ) =$$

Enrhifo

$$18\sqrt{6}+1\approx 45.09081537$$

Camau Ateb

Cyfrifwch y briodoledd ddosrannol drwy luosi pob 4\sqrt{2}-\sqrt{3} gan bob 2\sqrt{2}+5\sqrt{3}.

$$8\left(\sqrt{2}\right)^{2}+20\sqrt{3}\sqrt{2}-2\sqrt{3}\sqrt{2}-5\left(\sqrt{3}\right)^{2}$$

Sgwâr \sqrt{2} yw 2.

$$8\times 2+20\sqrt{3}\sqrt{2}-2\sqrt{3}\sqrt{2}-5\left(\sqrt{3}\right)^{2}$$

Lluosi 8 a 2 i gael 16.

$$16+20\sqrt{3}\sqrt{2}-2\sqrt{3}\sqrt{2}-5\left(\sqrt{3}\right)^{2}$$

I luosi \sqrt{3} a \sqrt{2}, dylid lluosi'r rhifau dan yr ail isradd.

$$16+20\sqrt{6}-2\sqrt{3}\sqrt{2}-5\left(\sqrt{3}\right)^{2}$$

I luosi \sqrt{3} a \sqrt{2}, dylid lluosi'r rhifau dan yr ail isradd.

$$16+20\sqrt{6}-2\sqrt{6}-5\left(\sqrt{3}\right)^{2}$$

Cyfuno 20\sqrt{6} a -2\sqrt{6} i gael 18\sqrt{6}.

$$16+18\sqrt{6}-5\left(\sqrt{3}\right)^{2}$$

Sgwâr \sqrt{3} yw 3.

$$16+18\sqrt{6}-5\times 3$$

Lluosi -5 a 3 i gael -15.

$$16+18\sqrt{6}-15$$

Tynnu 15 o 16 i gael 1.

$$1+18\sqrt{6}$$