Y*(Y+4) = (Y+2)*(2Y-1)
Y^2 + 4Y = 2Y^2 + 3Y - 2
Y^2 - Y - 2 = 0
D = 1 -4*1*(-2) = 9 ( V D = 3)
Y1 = ( 1 + 3 ) 2 = 2
Y2 =( - 1 )
Оцени ответ
Вход
Регистрация
Задать вопрос
Y*(Y+4) = (Y+2)*(2Y-1)
Y^2 + 4Y = 2Y^2 + 3Y - 2
Y^2 - Y - 2 = 0
D = 1 -4*1*(-2) = 9 ( V D = 3)
Y1 = ( 1 + 3 ) 2 = 2
Y2 =( - 1 )