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x²(x-12)+x-12=0
(x²+1)(x-12)=0
x²+1=0
x²=-1 brak rozw.
x-12=0
x=12
Odp.x=12
x³-7x²+2x-14=0
x²(x-7)+2(x-7)=0
(x²+2)(x-7)=0
x²+2=0
x²=-2 brak rozw.
x-7=0
x=7
Odp.x=7
(x²+1)(x-12)=0
x²+1=0 x-12=0
x²=-1 x=12
x1=pierwiastek z -1
x2=pierwiastek z 1
x³-7x²+2x-14=0
(x-7)(x²+2)=0
x-7=0 lub x²+2=0
x=7 x²=-2 x1= pierwiastek z -2 lubx2=pierwiastek z 2