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KYKYETA
@KYKYETA
July 2022
1
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Помогите решить уравнение.
480/x - 480/(x+20) = 4
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Diantusav
Раскрываем скобки,4 переносим,приравниваем к одному знаменателю x(x=20) 480x+9600-480x-4x^2-80x/x(x+20)=0 ; -4x^2-80x+9600=0 , x не равен 0 и-20 ; умножаем на -1 4x^2+80x-9600=0 ; сокращаем на 4 x^2+20x-2400=0 ;D=400+9600=10000 ;
x1=(-20+100)/2=60
x2=(-20-100)/2=-60
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x1=(-20+100)/2=60
x2=(-20-100)/2=-60