8-sinf algebra 6-bsb 1-var.@chsb_uzb

[image: ]8 sinf algebradan 6 – bsb savollari i variant 1. berilgan chala kvadrat tenglamalarni yeching. (5 ball) 1) 2𝑥2 = 0; 2) 3𝑥2 = 75; 3) 4𝑥2 − 28𝑥 = 0. 2. berilgan kvadrat tenglamani diskriminant yordamida yeching: (5 ball) 6𝑥2 − 17𝑥 + 5 = 0 3. 𝑥2 − 8𝑥 − 3 = 0 tenglama ildizlari 𝑥1 va 𝑥2 bo‘lsin. (𝑥1 + 𝑥2)3 + 6 ∙ 𝑥1 ∙ 𝑥2 ifoda qiymatini toping. (4 ball) 4. tenglamani yeching: (5 ball) (𝑥2 + 6𝑥)2 + 13 ∙ (𝑥2 + 6𝑥) + 40 = 0 5. 450 km masofani tezyurar poyezd yuk poyezdiga qaraganda 1 soat tezroq o‘tdi. agar yuk poyezdining tezligi tezyurar poyezdnikidan 15 km/h kam bo‘lsa, har bir poyezdning …

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