rozłóż wielomian na czynniki
a) x do potęgi 3 - 2x do potęgi 2 + 2x - 4
b) 3x do potęgi 3 + 6x do potęgi 2 - x - 2
c) x do potęgi 3 - 1/2x do potęgi 2 + 4x - 2
d) -12x do potęgi 3 + 4x do potęgi 2 + 9x - 3
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a)x³-2x²+2x-4=
=x²(x-2)+2(x-2)=
=(x²+2)(x-2)=
=(x+√2)(x+√2)(x-2)
b)3x³+6x²-x-2=
3x²(x+2)-1(x+2)=
=(3x²-1)(x+2)=
=(√3x-1)(√3x+1)(x+2)
c)x³-½x²+4x-2=
=x²(x-½)+4(x-½)=
=(x²+4)(x-½)=
=(x+2)(x+2)(x-½)
d)-12x³+4x²+9x-3=
=4x²(-3x+1)-3(-3x+1)=
=(4x²-3)(-3x+1)=
=(2x-√3)(2x+√3)(-3x+1)