{left(-2sqrt{7}right)}^2-4*4*1= eching

$${ \left(-2 \sqrt{ 7 } \right) }^{ 2 } -4 \times 4 \times 1=$$

Baholash

$$12$$

Yechim qadamlari

\left(-2\sqrt{7}\right)^{2} ni kengaytirish.

$$\left(-2\right)^{2}\left(\sqrt{7}\right)^{2}-4\times 4\times 1$$

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

$$4\left(\sqrt{7}\right)^{2}-4\times 4\times 1$$

\sqrt{7} kvadrati – 7.

$$4\times 7-4\times 4\times 1$$

28 hosil qilish uchun 4 va 7 ni ko'paytirish.

$$28-4\times 4\times 1$$

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

$$28-16\times 1$$

16 hosil qilish uchun 16 va 1 ni ko'paytirish.

$$28-16$$

12 olish uchun 28 dan 16 ni ayirish.

$$12$$

Omil

$$2^{2}\times 3$$