M(65)=-1/28(65)^2+3(65)-31 eching

$$M ( 65 ) = - \frac { 1 } { 28 } ( 65 ) ^ { 2 } + 3 ( 65 ) - 31$$

Baholash

$$\frac{367}{28}\approx 13,107142857$$

Yechim qadamlari

2 daraja ko‘rsatkichini 65 ga hisoblang va 4225 ni qiymatni oling.

$$-\frac{1}{28}\times 4225+3\times 65-31$$

-\frac{1}{28}\times 4225 ni yagona kasrga aylantiring.

$$\frac{-4225}{28}+3\times 65-31$$

\frac{-4225}{28} kasri manfiy belgini olib tashlash bilan -\frac{4225}{28} sifatida qayta yozilishi mumkin.

$$-\frac{4225}{28}+3\times 65-31$$

195 hosil qilish uchun 3 va 65 ni ko'paytirish.

$$-\frac{4225}{28}+195-31$$

195 ni \frac{5460}{28} kasrga o‘giring.

$$-\frac{4225}{28}+\frac{5460}{28}-31$$

-\frac{4225}{28} va \frac{5460}{28} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{-4225+5460}{28}-31$$

1235 olish uchun -4225 va 5460'ni qo'shing.

$$\frac{1235}{28}-31$$

31 ni \frac{868}{28} kasrga o‘giring.

$$\frac{1235}{28}-\frac{868}{28}$$

\frac{1235}{28} va \frac{868}{28} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{1235-868}{28}$$

367 olish uchun 1235 dan 868 ni ayirish.

$$\frac{367}{28}$$

Omil

$$\frac{367}{2 ^ {2} \cdot 7} = 13\frac{3}{28} = 13,107142857142858$$