rozwiąż równanie: 1. x^3-6x=4
x³-6x=4
x³-6x-4=0
x³+2x²-2x²-4x-2x-4=0
x²(x+2)-2x(x+2)-2(x+2)=0
(x+2)(x²-2x-2)=0
x²-2x-2=0 lub x+2=0
a=1
b=-2
c=-2
Δ=b²-4ac
Δ=(-2)²-4·1·(-2)=4+8=12
√Δ=2√3
x=(2√3+2)/2 lub x=(-2√3+2)/2 lub x=-2
x=√3+1 lub x=-√3+1 lub x=-2
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x³-6x=4
x³-6x-4=0
x³+2x²-2x²-4x-2x-4=0
x²(x+2)-2x(x+2)-2(x+2)=0
(x+2)(x²-2x-2)=0
x²-2x-2=0 lub x+2=0
a=1
b=-2
c=-2
Δ=b²-4ac
Δ=(-2)²-4·1·(-2)=4+8=12
√Δ=2√3
x=(2√3+2)/2 lub x=(-2√3+2)/2 lub x=-2
x=√3+1 lub x=-√3+1 lub x=-2