2({left(-5/4right)}^2+5(-5/4)-7 eching

$$2( { \left( \frac{ -5 }{ 4 } \right) }^{ 2 } +5( \frac{ -5 }{ 4 } )-7$$

Baholash

$$-\frac{187}{8}=-23,375$$

Yechim qadamlari

\frac{-5}{4} kasri manfiy belgini olib tashlash bilan -\frac{5}{4} sifatida qayta yozilishi mumkin.

$$2\left(\left(-\frac{5}{4}\right)^{2}+5\times \frac{-5}{4}-7\right)$$

2 daraja ko‘rsatkichini -\frac{5}{4} ga hisoblang va \frac{25}{16} ni qiymatni oling.

$$2\left(\frac{25}{16}+5\times \frac{-5}{4}-7\right)$$

\frac{-5}{4} kasri manfiy belgini olib tashlash bilan -\frac{5}{4} sifatida qayta yozilishi mumkin.

$$2\left(\frac{25}{16}+5\left(-\frac{5}{4}\right)-7\right)$$

-\frac{25}{4} hosil qilish uchun 5 va -\frac{5}{4} ni ko'paytirish.

$$2\left(\frac{25}{16}-\frac{25}{4}-7\right)$$

-\frac{75}{16} olish uchun \frac{25}{16} dan \frac{25}{4} ni ayirish.

$$2\left(-\frac{75}{16}-7\right)$$

-\frac{187}{16} olish uchun -\frac{75}{16} dan 7 ni ayirish.

$$2\left(-\frac{187}{16}\right)$$

-\frac{187}{8} hosil qilish uchun 2 va -\frac{187}{16} ni ko'paytirish.

$$-\frac{187}{8}$$

Omil

$$-\frac{187}{8} = -23\frac{3}{8} = -23,375$$