3x^2-5x-9 eching

$$3 { x }^{ 2 } -5x-9$$

Omil

$$3\left(x-\frac{5-\sqrt{133}}{6}\right)\left(x-\frac{\sqrt{133}+5}{6}\right)$$

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.

$$3x^{2}-5x-9=0$$

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.

$$x=\frac{-\left(-5\right)±\sqrt{\left(-5\right)^{2}-4\times 3\left(-9\right)}}{2\times 3}$$

-5 kvadratini chiqarish.

$$x=\frac{-\left(-5\right)±\sqrt{25-4\times 3\left(-9\right)}}{2\times 3}$$

-4 ni 3 marotabaga ko'paytirish.

$$x=\frac{-\left(-5\right)±\sqrt{25-12\left(-9\right)}}{2\times 3}$$

-12 ni -9 marotabaga ko'paytirish.

$$x=\frac{-\left(-5\right)±\sqrt{25+108}}{2\times 3}$$

25 ni 108 ga qo'shish.

$$x=\frac{-\left(-5\right)±\sqrt{133}}{2\times 3}$$

-5 ning teskarisi 5 ga teng.

$$x=\frac{5±\sqrt{133}}{2\times 3}$$

2 ni 3 marotabaga ko'paytirish.

$$x=\frac{5±\sqrt{133}}{6}$$

x=\frac{5±\sqrt{133}}{6} tenglamasini yeching, bunda ± musbat. 5 ni \sqrt{133} ga qo'shish.

$$x=\frac{\sqrt{133}+5}{6}$$

x=\frac{5±\sqrt{133}}{6} tenglamasini yeching, bunda ± manfiy. 5 dan \sqrt{133} ni ayirish.

$$x=\frac{5-\sqrt{133}}{6}$$

ax^{2}+bx+c=a\left(x-x_{1}\right)\left(x-x_{2}\right) formulasi yordamida amalni hisoblang. x_{1} uchun \frac{5+\sqrt{133}}{6} ga va x_{2} uchun \frac{5-\sqrt{133}}{6} ga bo‘ling.

$$3x^{2}-5x-9=3\left(x-\frac{\sqrt{133}+5}{6}\right)\left(x-\frac{5-\sqrt{133}}{6}\right)$$

Baholash

$$3x^{2}-5x-9$$