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DashaSkillets1
@DashaSkillets1
July 2022
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Решите подбором приведенное квадратное уравнение:
а) x^2-13x+22=0
б) x^2+2x-24=0
в) x^2-2x-80=0
г) x^2+12x+35=0
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dilbar2015
А)х^2-13х+22=0Д=169-4*1*22=169-88=81->√д=9Х1=13-9/2=2Х2=13+9/2=11Б)х^2+2х-24=0Д=4+4*24=4+96=100->√d=10Х1=-2-10/2=-6Х2=-2+10/2=4В)х^2-2х-80=0Д=4+4*80=324->д=18Х1=2-18/2=-8Х2=2+18/2=10Г)х^2+12+35=0Д=144-4*35=144-140=4->д=2Х1=-12-2/2=-7Х2=-12+2/2=-5
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