Albatta, sizga x^3 + 2x^2 - x - 1 = 0 kub tenglamasini Cardano usuli yordamida yechishda yordam beraman. Quyidagi qadamlar: 1-bosqich: tenglamani x^3 + px + q = 0 x^3 + 2x^2 - x - 1 = 0 shaklida joylashtiring x^3 + 0x^2 + 2x^2 - x - 1 = 0, shuning uchun p = 0 va q = -1. 2-bosqich: tenglamada x = y - b / 3 ni almashtiring, bu erda b = -p/3 b = -p/3 = 0/3 = 0, shuning uchun biz b = 0. tenglamda x = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y = y
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