Issolvi -frac{sqrt{(20^2)+2(981)(40)-2(981)(0)+20}}{981}

$$- \frac{ \sqrt{ ( { 20 }^{ 2 } )+2(981)(40)-2(981)(0)+20 } }{ 981 }$$

Evalwa

$$-\frac{10\sqrt{789}}{981}\approx -0.286331741$$

Passi tas-Soluzzjonijiet

Ikkalkula 20 bil-power ta' 2 u tikseb 400.

$$-\frac{\sqrt{400+2\times 981\times 40-2\times 981\times 0+20}}{981}$$

Immultiplika 2 u 981 biex tikseb 1962.

$$-\frac{\sqrt{400+1962\times 40-2\times 981\times 0+20}}{981}$$

Immultiplika 1962 u 40 biex tikseb 78480.

$$-\frac{\sqrt{400+78480-2\times 981\times 0+20}}{981}$$

Żid 400 u 78480 biex tikseb 78880.

$$-\frac{\sqrt{78880-2\times 981\times 0+20}}{981}$$

Immultiplika 2 u 981 biex tikseb 1962.

$$-\frac{\sqrt{78880-1962\times 0+20}}{981}$$

Immultiplika 1962 u 0 biex tikseb 0.

$$-\frac{\sqrt{78880-0+20}}{981}$$

Naqqas 0 minn 78880 biex tikseb 78880.

$$-\frac{\sqrt{78880+20}}{981}$$

Żid 78880 u 20 biex tikseb 78900.

$$-\frac{\sqrt{78900}}{981}$$

Iffattura 78900=10^{2}\times 789. Erġa' ikteb l-għerq kwadrat tal-prodott \sqrt{10^{2}\times 789} bħala l-prodott tal-għeruq kwadrati \sqrt{10^{2}}\sqrt{789}. Ħu l-għerq kwadrat ta' 10^{2}.

$$-\frac{10\sqrt{789}}{981}$$