x3+3x2-4x-12=0
x³-3x²-4x-12=0x²(x-3)-4(x+3)=0(x²-4)(x+3)=0(x-2)(x+2)(x+3)=0x-2=0 x=2 x+2=0x=-2x+3=0x=-3
b]
x>lub rowne1
x> lub r-2
x> l.r3
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x3+3x2-4x-12=0
x³-3x²-4x-12=0
x²(x-3)-4(x+3)=0
(x²-4)(x+3)=0
(x-2)(x+2)(x+3)=0
x-2=0
x=2
x+2=0
x=-2
x+3=0
x=-3
b]
x>lub rowne1
x> lub r-2
x> l.r3