-x^2+15x eching

$$- x ^ { 2 } + 15 x$$

Omil

$$x\left(15-x\right)$$

Yechim qadamlari

x omili.

$$x\left(-x+15\right)$$

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.

$$-x^{2}+15x=0$$

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.

$$x=\frac{-15±\sqrt{15^{2}}}{2\left(-1\right)}$$

15^{2} ning kvadrat ildizini chiqarish.

$$x=\frac{-15±15}{2\left(-1\right)}$$

2 ni -1 marotabaga ko'paytirish.

$$x=\frac{-15±15}{-2}$$

x=\frac{-15±15}{-2} tenglamasini yeching, bunda ± musbat. -15 ni 15 ga qo'shish.

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

0 ni -2 ga bo'lish.

$$x=0$$

x=\frac{-15±15}{-2} tenglamasini yeching, bunda ± manfiy. -15 dan 15 ni ayirish.

$$x=-\frac{30}{-2}$$

-30 ni -2 ga bo'lish.

$$x=15$$

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 15 ga bo‘ling.

$$-x^{2}+15x=-x\left(x-15\right)$$

Baholash

$$x\left(15-x\right)$$