Datrys frac{-1+-sqrt{-2^2-4*1*(-3)}}{2.1}

$$\frac{ -1+- \sqrt{ - { 2 }^{ 2 } -4 \times 1 \times (-3) } }{ 2.1 }$$

Enrhifo

$$\frac{-20\sqrt{2}-10}{21}\approx -1.823060536$$

Camau Ateb

Cyfrifo 2 i bŵer 2 a chael 4.

$$\frac{-1-\sqrt{-4-4\times 1\left(-3\right)}}{2.1}$$

Lluosi 4 a 1 i gael 4.

$$\frac{-1-\sqrt{-4-4\left(-3\right)}}{2.1}$$

Lluosi 4 a -3 i gael -12.

$$\frac{-1-\sqrt{-4-\left(-12\right)}}{2.1}$$

Gwrthwyneb -12 yw 12.

$$\frac{-1-\sqrt{-4+12}}{2.1}$$

Adio -4 a 12 i gael 8.

$$\frac{-1-\sqrt{8}}{2.1}$$

Ffactora 8=2^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{2^{2}\times 2} fel lluoswm ail israddau \sqrt{2^{2}}\sqrt{2}. Cymryd isradd 2^{2}.

$$\frac{-1-2\sqrt{2}}{2.1}$$

Ffactor

$$\frac{10 {(-2 \sqrt{2} - 1)}}{21} = -1.823060535593424$$