Объяснение:
X(x-1)-3(x+2)=1
x²-x-3x-6=1
x²-4x-7=0
Δ=16+49=65
√Δ=√65
x1=(4-√65)/2
x2=(4+√65)/2
x1= 2+
x2=2-
открываем скобки
-x-3x-6=1
-4x-7=0
считаем через дискриминант
x1=
x2=
Объяснение:
X(x-1)-3(x+2)=1
x²-x-3x-6=1
x²-4x-7=0
Δ=16+49=65
√Δ=√65
x1=(4-√65)/2
x2=(4+√65)/2
x1= 2+
x2=2-
Объяснение:
открываем скобки
считаем через дискриминант
x1=
x2=
x1=
x2=
x1= 2+
x2=2-