Xayoliy ildizlarga EGA kvadrat tenglamalarga misollar. Kvadrat ildiz: hisoblash formulalari. Kvadrat tenglama ildizlarini topish formulasi. Kvadrat tenglama nima?

X 2 - x - 6 \u003d 0 tenglamani eching
Qarorni ko'rib chiqing va javob bering

Layf xakerning uchinchi qismini ko'ring (Vetnam teoremasi)
Ushbu tenglamada a \u003d 1, shuning uchun biz buni yozishimiz mumkin \\ begin (case) x_1 + x_2 \u003d 1 \\\\ x_1 \\ cdot x_2 \u003d -6 \\ end (case)
Tanlash orqali biz x_1 \u003d 3, x_2 \u003d -2 ekanligini aniqlaymiz.
Javob: 3, -2.

10. 
    X 2 - 15x - 16 \u003d 0 tenglamani eching
    Qarorni ko'rib chiqing va javob bering
    

Layf xakerni ikkinchi ko'ring
Ushbu tenglamada a \u003d 1, b \u003d -15, c \u003d -16. Shunday qilib, a + c \u003d b, qaerdan x_1 \u003d -1, x_2 \u003d - \\ frac (c) (a) \u003d - \\ frac (-16) (1) \u003d 16.
Javob: -1, 16.

11. 
    X2 + 11x - 12 \u003d 0 tenglamani eching
    Qarorni ko'rib chiqing va javob bering
    

Avval layf-xakerni ko'ring
Ushbu tenglamada a \u003d 1, b \u003d 11, c \u003d -12. Shunday qilib, a + b + c \u003d 0, qaerdan x_1 \u003d 1, x_2 \u003d \\ frac (c) (a) \u003d \\ frac (-12) (1) \u003d - 12.
Javob: 1, -12.
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