(2sqrt{7}-3)(2sqrt{7}+3) eching

$$( 2 \sqrt { 7 } - 3 ) ( 2 \sqrt { 7 } + 3 )$$

Baholash

$$19$$

Yechim qadamlari

Ko‘paytirish qoida yordamida turli kvadratlarga aylantirilishi mumkin: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.

$$\left(2\sqrt{7}\right)^{2}-3^{2}$$

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

$$2^{2}\left(\sqrt{7}\right)^{2}-3^{2}$$

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

$$4\left(\sqrt{7}\right)^{2}-3^{2}$$

\sqrt{7} kvadrati – 7.

$$4\times 7-3^{2}$$

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

$$28-3^{2}$$

2 daraja ko‘rsatkichini 3 ga hisoblang va 9 ni qiymatni oling.

$$28-9$$

19 olish uchun 28 dan 9 ni ayirish.

$$19$$

Omil

$$19$$