Question

4÷х=х-3 решить уравнение

Answer 1

4 : Х = Х - 3
Х не равен 0
4 = Х•( Х - 3 )
4 = х^2 - 3х
Х^2 - 3х - 4 = 0
D = 9 + 16 = 25 ; VD = 5
X1 = ( 3 + 5 ) : 2 = 4
X2 = ( 3 - 5 ) : 2 = - 1
Ответ 4 ; - 1

Answer 2

$frac{4}{x} = frac{x-3}{1} \ x(x-3)=4 \ x^{2} -3*x-4=0 \ D=9+16= 5^{2} \ x_{1} = frac{3+5}{2} =4 \ x_{2} = frac{3-5}{2} =-1$