Rozłóż wielomiana na czynniki jak najniższych stopni :
a)
x³+x²+x+1
b)
2x³+3x²+4x+6
c)
x³-5x²+x-5
d)
2x³-8x²-5x+20
e)
x⁴+4x³-x-4
z góry dzięki bardzo ;))
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a)
x³+x²+x+1 = x²(x+1) + 1·(x+1) = (x+1)(x²+1)
b)
2x³+3x²+4x+6 = x²(2x+3)+2·(2x+3) = (2x+3)(x²+2)
c)
x³-5x²+x-5 = x²(x-5) + 1·(x-5) = (x-5)(x²+1)
d)
2x³-8x²-5x+20 = 2x²(x-4) - 5·(x-4) = (x-4)(2x²-5)
e)
x⁴+4x³-x-4 = x³(x+4) - 1·(x+4) = (x+4)(x³-1) = (x+4)(x-1)(x²+x+1)