4x^2=7x eching

$$4 x ^ { 2 } = 7 x$$

x uchun yechish

$$x = \frac{7}{4} = 1\frac{3}{4} = 1,75$$

$$x=0$$

Faktorlash qadamlari

Ikkala tarafdan 7x ni ayirish.

$$4x^{2}-7x=0$$

x omili.

$$x\left(4x-7\right)=0$$

Tenglamani yechish uchun x=0 va 4x-7=0 ni yeching.

$$x=0 x=\frac{7}{4}$$

Kvadrat tenglamalaridan foydalanish qoidalari

Ikkala tarafdan 7x ni ayirish.

$$4x^{2}-7x=0$$

Ushbu tenglama standart shaklidadir: ax^{2}+bx+c=0. Kvadrat tenglama formulasida, \frac{-b±\sqrt{b^{2}-4ac}}{2a} 4 ni a, -7 ni b va 0 ni c bilan almashtiring.

$$x=\frac{-\left(-7\right)±\sqrt{\left(-7\right)^{2}}}{2\times 4}$$

\left(-7\right)^{2} ning kvadrat ildizini chiqarish.

$$x=\frac{-\left(-7\right)±7}{2\times 4}$$

-7 ning teskarisi 7 ga teng.

$$x=\frac{7±7}{2\times 4}$$

2 ni 4 marotabaga ko'paytirish.

$$x=\frac{7±7}{8}$$

x=\frac{7±7}{8} tenglamasini yeching, bunda ± musbat. 7 ni 7 ga qo'shish.

$$x=\frac{14}{8}$$

\frac{14}{8} ulushini 2 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$x=\frac{7}{4}$$

x=\frac{7±7}{8} tenglamasini yeching, bunda ± manfiy. 7 dan 7 ni ayirish.

$$x=\frac{0}{8}$$

0 ni 8 ga bo'lish.

$$x=0$$

Tenglama yechildi.

$$x=\frac{7}{4} x=0$$

Kvadratni yakunlash bo'yicha qadamlar

Ikkala tarafdan 7x ni ayirish.

$$4x^{2}-7x=0$$

Ikki tarafini 4 ga bo‘ling.

$$\frac{4x^{2}-7x}{4}=\frac{0}{4}$$

4 ga bo'lish 4 ga ko'paytirishni bekor qiladi.

$$x^{2}-\frac{7}{4}x=\frac{0}{4}$$

0 ni 4 ga bo'lish.

$$x^{2}-\frac{7}{4}x=0$$

-\frac{7}{4} ni bo‘lish, x shartining koeffitsienti, 2 ga -\frac{7}{8} olish uchun. Keyin, -\frac{7}{8} ning kvadratini tenglamaning ikkala tarafiga qo‘shing. Ushbu qadam tenglamaning chap qismini mukammal kvadrat sifatida hosil qiladi.

$$x^{2}-\frac{7}{4}x+\left(-\frac{7}{8}\right)^{2}=\left(-\frac{7}{8}\right)^{2}$$

Kasrning ham suratini, ham maxrajini kvadratga ko'paytirib -\frac{7}{8} kvadratini chiqarish.

$$x^{2}-\frac{7}{4}x+\frac{49}{64}=\frac{49}{64}$$

x^{2}-\frac{7}{4}x+\frac{49}{64} omili. Odatda, x^{2}+bx+c mukammal kvadrat bo'lsa, u doimo \left(x+\frac{b}{2}\right)^{2} omil sifatida bo'lishi mumkin.

$$\left(x-\frac{7}{8}\right)^{2}=\frac{49}{64}$$

Tenglamaning ikkala tarafining kvadrat ildizini chiqarish.

$$\sqrt{\left(x-\frac{7}{8}\right)^{2}}=\sqrt{\frac{49}{64}}$$

Qisqartirish.

$$x-\frac{7}{8}=\frac{7}{8} x-\frac{7}{8}=-\frac{7}{8}$$

\frac{7}{8} ni tenglamaning ikkala tarafiga qo'shish.

$$x=\frac{7}{4} x=0$$