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dasha200025
@dasha200025
July 2022
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Skeletgleb
Перемножаем крест-накрест (x-4)x=2(10+2x).Переносим всё в левую часть (x-4)x-2(10+2x)=0.Раскрываем скобки x^2-4x-20-4x=0 x^2-8x-20=0,находим дискриминант D=b^2-4ac,D=8^2+4*1*20=144.x1= (8 - √144)/2=-2,x2=(8+
√144)/2=10,x1=-2 x2=10
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