7x-x^2 eching

$$7 x - x ^ { 2 }$$

Omil

$$x\left(7-x\right)$$

Yechim qadamlari

x omili.

$$x\left(7-x\right)$$

Kvadrat tenglamalaridan foydalanish qoidalari

Kvadrat koʻp tenglama bu orqali hisoblanadi: ax^{2}+bx+c=a\left(x-x_{1}\right)\left(x-x_{2}\right), bu yerda x_{1} va x_{2} ax^{2}+bx+c=0 kvadrat tenglamaning yechimlari.

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

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.

$$x=\frac{-7±\sqrt{7^{2}}}{2\left(-1\right)}$$

7^{2} ning kvadrat ildizini chiqarish.

$$x=\frac{-7±7}{2\left(-1\right)}$$

2 ni -1 marotabaga ko'paytirish.

$$x=\frac{-7±7}{-2}$$

x=\frac{-7±7}{-2} tenglamasini yeching, bunda ± musbat. -7 ni 7 ga qo'shish.

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

0 ni -2 ga bo'lish.

$$x=0$$

x=\frac{-7±7}{-2} tenglamasini yeching, bunda ± manfiy. -7 dan 7 ni ayirish.

$$x=-\frac{14}{-2}$$

-14 ni -2 ga bo'lish.

$$x=7$$

ax^{2}+bx+c=a\left(x-x_{1}\right)\left(x-x_{2}\right) formulasi yordamida amalni hisoblang. x_{1} uchun 0 ga va x_{2} uchun 7 ga bo‘ling.

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

Baholash

$$x\left(7-x\right)$$