5x^2-25x=0 eching

$$5 x ^ { 2 } - 25 x = 0$$

x uchun yechish

$$x=5$$

$$x=0$$

Faktorlash qadamlari

x omili.

$$x\left(5x-25\right)=0$$

Tenglamani yechish uchun x=0 va 5x-25=0 ni yeching.

$$x=0 x=5$$

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.

$$5x^{2}-25x=0$$

Ushbu tenglama standart shaklidadir: ax^{2}+bx+c=0. Kvadrat tenglama formulasida, \frac{-b±\sqrt{b^{2}-4ac}}{2a} 5 ni a, -25 ni b va 0 ni c bilan almashtiring.

$$x=\frac{-\left(-25\right)±\sqrt{\left(-25\right)^{2}}}{2\times 5}$$

\left(-25\right)^{2} ning kvadrat ildizini chiqarish.

$$x=\frac{-\left(-25\right)±25}{2\times 5}$$

-25 ning teskarisi 25 ga teng.

$$x=\frac{25±25}{2\times 5}$$

2 ni 5 marotabaga ko'paytirish.

$$x=\frac{25±25}{10}$$

x=\frac{25±25}{10} tenglamasini yeching, bunda ± musbat. 25 ni 25 ga qo'shish.

$$x=\frac{50}{10}$$

50 ni 10 ga bo'lish.

$$x=5$$

x=\frac{25±25}{10} tenglamasini yeching, bunda ± manfiy. 25 dan 25 ni ayirish.

$$x=\frac{0}{10}$$

0 ni 10 ga bo'lish.

$$x=0$$

Tenglama yechildi.

$$x=5 x=0$$

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.

$$5x^{2}-25x=0$$

Ikki tarafini 5 ga bo‘ling.

$$\frac{5x^{2}-25x}{5}=\frac{0}{5}$$

5 ga bo'lish 5 ga ko'paytirishni bekor qiladi.

$$x^{2}+\left(-\frac{25}{5}\right)x=\frac{0}{5}$$

-25 ni 5 ga bo'lish.

$$x^{2}-5x=\frac{0}{5}$$

0 ni 5 ga bo'lish.

$$x^{2}-5x=0$$

-5 ni bo‘lish, x shartining koeffitsienti, 2 ga -\frac{5}{2} olish uchun. Keyin, -\frac{5}{2} ning kvadratini tenglamaning ikkala tarafiga qo‘shing. Ushbu qadam tenglamaning chap qismini mukammal kvadrat sifatida hosil qiladi.

$$x^{2}-5x+\left(-\frac{5}{2}\right)^{2}=\left(-\frac{5}{2}\right)^{2}$$

Kasrning ham suratini, ham maxrajini kvadratga ko'paytirib -\frac{5}{2} kvadratini chiqarish.

$$x^{2}-5x+\frac{25}{4}=\frac{25}{4}$$

x^{2}-5x+\frac{25}{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.

$$\left(x-\frac{5}{2}\right)^{2}=\frac{25}{4}$$

Tenglamaning ikkala tarafining kvadrat ildizini chiqarish.

$$\sqrt{\left(x-\frac{5}{2}\right)^{2}}=\sqrt{\frac{25}{4}}$$

Qisqartirish.

$$x-\frac{5}{2}=\frac{5}{2} x-\frac{5}{2}=-\frac{5}{2}$$

\frac{5}{2} ni tenglamaning ikkala tarafiga qo'shish.

$$x=5 x=0$$