2h^2+4h-10=0 eching

$$2 h ^ { 2 } + 4 h - 10 = 0$$

h uchun yechish

$$h=\sqrt{6}-1\approx 1,449489743$$

$$h=-\sqrt{6}-1\approx -3,449489743$$

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.

$$2h^{2}+4h-10=0$$

Ushbu tenglama standart shaklidadir: ax^{2}+bx+c=0. Kvadrat tenglama formulasida, \frac{-b±\sqrt{b^{2}-4ac}}{2a} 2 ni a, 4 ni b va -10 ni c bilan almashtiring.

$$h=\frac{-4±\sqrt{4^{2}-4\times 2\left(-10\right)}}{2\times 2}$$

4 kvadratini chiqarish.

$$h=\frac{-4±\sqrt{16-4\times 2\left(-10\right)}}{2\times 2}$$

-4 ni 2 marotabaga ko'paytirish.

$$h=\frac{-4±\sqrt{16-8\left(-10\right)}}{2\times 2}$$

-8 ni -10 marotabaga ko'paytirish.

$$h=\frac{-4±\sqrt{16+80}}{2\times 2}$$

16 ni 80 ga qo'shish.

$$h=\frac{-4±\sqrt{96}}{2\times 2}$$

96 ning kvadrat ildizini chiqarish.

$$h=\frac{-4±4\sqrt{6}}{2\times 2}$$

2 ni 2 marotabaga ko'paytirish.

$$h=\frac{-4±4\sqrt{6}}{4}$$

h=\frac{-4±4\sqrt{6}}{4} tenglamasini yeching, bunda ± musbat. -4 ni 4\sqrt{6} ga qo'shish.

$$h=\frac{4\sqrt{6}-4}{4}$$

-4+4\sqrt{6} ni 4 ga bo'lish.

$$h=\sqrt{6}-1$$

h=\frac{-4±4\sqrt{6}}{4} tenglamasini yeching, bunda ± manfiy. -4 dan 4\sqrt{6} ni ayirish.

$$h=\frac{-4\sqrt{6}-4}{4}$$

-4-4\sqrt{6} ni 4 ga bo'lish.

$$h=-\sqrt{6}-1$$

Tenglama yechildi.

$$h=\sqrt{6}-1 h=-\sqrt{6}-1$$

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.

$$2h^{2}+4h-10=0$$

10 ni tenglamaning ikkala tarafiga qo'shish.

$$2h^{2}+4h-10-\left(-10\right)=-\left(-10\right)$$

O‘zidan -10 ayirilsa 0 qoladi.

$$2h^{2}+4h=-\left(-10\right)$$

0 dan -10 ni ayirish.

$$2h^{2}+4h=10$$

Ikki tarafini 2 ga bo‘ling.

$$\frac{2h^{2}+4h}{2}=\frac{10}{2}$$

2 ga bo'lish 2 ga ko'paytirishni bekor qiladi.

$$h^{2}+\frac{4}{2}h=\frac{10}{2}$$

4 ni 2 ga bo'lish.

$$h^{2}+2h=\frac{10}{2}$$

10 ni 2 ga bo'lish.

$$h^{2}+2h=5$$

2 ni bo‘lish, x shartining koeffitsienti, 2 ga 1 olish uchun. Keyin, 1 ning kvadratini tenglamaning ikkala tarafiga qo‘shing. Ushbu qadam tenglamaning chap qismini mukammal kvadrat sifatida hosil qiladi.

$$h^{2}+2h+1^{2}=5+1^{2}$$

1 kvadratini chiqarish.

$$h^{2}+2h+1=5+1$$

5 ni 1 ga qo'shish.

$$h^{2}+2h+1=6$$

h^{2}+2h+1 omili. Odatda, x^{2}+bx+c mukammal kvadrat bo'lsa, u doimo \left(x+\frac{b}{2}\right)^{2} omil sifatida bo'lishi mumkin.

$$\left(h+1\right)^{2}=6$$

Tenglamaning ikkala tarafining kvadrat ildizini chiqarish.

$$\sqrt{\left(h+1\right)^{2}}=\sqrt{6}$$

Qisqartirish.

$$h+1=\sqrt{6} h+1=-\sqrt{6}$$

Tenglamaning ikkala tarafidan 1 ni ayirish.

$$h=\sqrt{6}-1 h=-\sqrt{6}-1$$