frac{-1+-sqrt{-2^2-4*1*(-3)}}{21} eching

$$\frac{ -1+- \sqrt{ - { 2 }^{ 2 } -4 \times 1 \times (-3) } }{ 21 }$$

Baholash

$$\frac{-2\sqrt{2}-1}{21}\approx -0,182306054$$

Yechim qadamlari

2 daraja ko‘rsatkichini 2 ga hisoblang va 4 ni qiymatni oling.

$$\frac{-1-\sqrt{-4-4\times 1\left(-3\right)}}{21}$$

4 hosil qilish uchun 4 va 1 ni ko'paytirish.

$$\frac{-1-\sqrt{-4-4\left(-3\right)}}{21}$$

-12 hosil qilish uchun 4 va -3 ni ko'paytirish.

$$\frac{-1-\sqrt{-4-\left(-12\right)}}{21}$$

-12 ning teskarisi 12 ga teng.

$$\frac{-1-\sqrt{-4+12}}{21}$$

8 olish uchun -4 va 12'ni qo'shing.

$$\frac{-1-\sqrt{8}}{21}$$

Faktor: 8=2^{2}\times 2. \sqrt{2^{2}\times 2} koʻpaytmasining kvadrat ildizini \sqrt{2^{2}}\sqrt{2} kvadrat ildizlarining koʻpaytmasi sifatida qayta yozing. 2^{2} ning kvadrat ildizini chiqarish.

$$\frac{-1-2\sqrt{2}}{21}$$

Omil

$$\frac{-2 \sqrt{2} - 1}{21} = -0,1823060535593424$$