Issolvi frac{8-sqrt{18}}{sqrt{2}}

$$\frac { 8 - \sqrt { 18 } } { \sqrt { 2 } }$$

Evalwa

$$4\sqrt{2}-3\approx 2.656854249$$

Passi tas-Soluzzjonijiet

Iffattura 18=3^{2}\times 2. Erġa' ikteb l-għerq kwadrat tal-prodott \sqrt{3^{2}\times 2} bħala l-prodott tal-għeruq kwadrati \sqrt{3^{2}}\sqrt{2}. Ħu l-għerq kwadrat ta' 3^{2}.

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

Irrazzjonalizza d-denominatur tal-\frac{8-3\sqrt{2}}{\sqrt{2}} billi timmultiplika in-numeratur u d-denominatur mill-\sqrt{2}.

$$\frac{\left(8-3\sqrt{2}\right)\sqrt{2}}{\left(\sqrt{2}\right)^{2}}$$

Il-kwadrat ta' \sqrt{2} huwa 2.

$$\frac{\left(8-3\sqrt{2}\right)\sqrt{2}}{2}$$

Uża l-propjetà distributtiva biex timmultiplika 8-3\sqrt{2} b'\sqrt{2}.

$$\frac{8\sqrt{2}-3\left(\sqrt{2}\right)^{2}}{2}$$

Il-kwadrat ta' \sqrt{2} huwa 2.

$$\frac{8\sqrt{2}-3\times 2}{2}$$

Immultiplika -3 u 2 biex tikseb -6.

$$\frac{8\sqrt{2}-6}{2}$$

Iddividi kull terminu ta' 8\sqrt{2}-6 b'2 biex tikseb4\sqrt{2}-3.

$$4\sqrt{2}-3$$