x^2-x-1=16180 eching

$${ x }^{ 2 } -x-1=16180$$

x uchun yechish

$$x = \frac{5 \sqrt{2589} + 1}{2} \approx 127,705542332$$

$$x=\frac{1-5\sqrt{2589}}{2}\approx -126,705542332$$

Kvadrat tenglamalaridan foydalanish qoidalari

ax^{2}+bx+c=0 shaklidagi barcha tenglamalarni kvadrat formulasi bilan yechish mumkin: \frac{-b±\sqrt{b^{2}-4ac}}{2a}. Kvadrat formula ikki yechmni taqdim qiladi, biri ± qo'shish bo'lganda, va ikkinchisi ayiruv bo'lganda.

$$x^{2}-x-1=16180$$

Tenglamaning ikkala tarafidan 16180 ni ayirish.

$$x^{2}-x-1-16180=16180-16180$$

O‘zidan 16180 ayirilsa 0 qoladi.

$$x^{2}-x-1-16180=0$$

-1 dan 16180 ni ayirish.

$$x^{2}-x-16181=0$$

Ushbu tenglama standart shaklidadir: ax^{2}+bx+c=0. Kvadrat tenglama formulasida, \frac{-b±\sqrt{b^{2}-4ac}}{2a} 1 ni a, -1 ni b va -16181 ni c bilan almashtiring.

$$x=\frac{-\left(-1\right)±\sqrt{1-4\left(-16181\right)}}{2}$$

-4 ni -16181 marotabaga ko'paytirish.

$$x=\frac{-\left(-1\right)±\sqrt{1+64724}}{2}$$

1 ni 64724 ga qo'shish.

$$x=\frac{-\left(-1\right)±\sqrt{64725}}{2}$$

64725 ning kvadrat ildizini chiqarish.

$$x=\frac{-\left(-1\right)±5\sqrt{2589}}{2}$$

-1 ning teskarisi 1 ga teng.

$$x=\frac{1±5\sqrt{2589}}{2}$$

x=\frac{1±5\sqrt{2589}}{2} tenglamasini yeching, bunda ± musbat. 1 ni 5\sqrt{2589} ga qo'shish.

$$x=\frac{5\sqrt{2589}+1}{2}$$

x=\frac{1±5\sqrt{2589}}{2} tenglamasini yeching, bunda ± manfiy. 1 dan 5\sqrt{2589} ni ayirish.

$$x=\frac{1-5\sqrt{2589}}{2}$$

Tenglama yechildi.

$$x=\frac{5\sqrt{2589}+1}{2} x=\frac{1-5\sqrt{2589}}{2}$$

Kvadratni yakunlash bo'yicha qadamlar

Bu kabi kvadrat tenglamalarni kvadratni yakunlab yechish mumkin. Kvadratni yechish uchun tenglama avval ushbu shaklda bo'lishi shart: x^{2}+bx=c.

$$x^{2}-x-1=16180$$

1 ni tenglamaning ikkala tarafiga qo'shish.

$$x^{2}-x-1-\left(-1\right)=16180-\left(-1\right)$$

O‘zidan -1 ayirilsa 0 qoladi.

$$x^{2}-x=16180-\left(-1\right)$$

16180 dan -1 ni ayirish.

$$x^{2}-x=16181$$

-1 ni bo‘lish, x shartining koeffitsienti, 2 ga -\frac{1}{2} olish uchun. Keyin, -\frac{1}{2} ning kvadratini tenglamaning ikkala tarafiga qo‘shing. Ushbu qadam tenglamaning chap qismini mukammal kvadrat sifatida hosil qiladi.

$$x^{2}-x+\left(-\frac{1}{2}\right)^{2}=16181+\left(-\frac{1}{2}\right)^{2}$$

Kasrning ham suratini, ham maxrajini kvadratga ko'paytirib -\frac{1}{2} kvadratini chiqarish.

$$x^{2}-x+\frac{1}{4}=16181+\frac{1}{4}$$

16181 ni \frac{1}{4} ga qo'shish.

$$x^{2}-x+\frac{1}{4}=\frac{64725}{4}$$

x^{2}-x+\frac{1}{4} omili. Odatda, x^{2}+bx+c mukammal kvadrat bo'lsa, u doimo \left(x+\frac{b}{2}\right)^{2} omil sifatida bo'lishi mumkin.

$$\left(x-\frac{1}{2}\right)^{2}=\frac{64725}{4}$$

Tenglamaning ikkala tarafining kvadrat ildizini chiqarish.

$$\sqrt{\left(x-\frac{1}{2}\right)^{2}}=\sqrt{\frac{64725}{4}}$$

Qisqartirish.

$$x-\frac{1}{2}=\frac{5\sqrt{2589}}{2} x-\frac{1}{2}=-\frac{5\sqrt{2589}}{2}$$

\frac{1}{2} ni tenglamaning ikkala tarafiga qo'shish.

$$x=\frac{5\sqrt{2589}+1}{2} x=\frac{1-5\sqrt{2589}}{2}$$