September 2018 1 19 Report

Rozwiąż równania:

( x3,x2 to jest do potęgi )

a) x3+4x2-x-4=0

b)x3+7x2-x-7=0

c)x3+2x2-16-32=0

d)x3-7x2-3x+21=0

e)3x3-3x2+4x-4=0

f)2x3-6x2+5x-15=0

g)x3-x2-9x+9=0

h)-3x3-15x2+x+5=0

i)-2x3+8x2+x-4=0

j)x3-x2-4x+4=0

Przykład podpunkt a)

a) x3+4x2-x-4=o

x2(x+4)-1(x+4)=0

(x+4)(x2-1)=0

(x+4)(x-1)(x+1)=0

x+4=0, x-1=0,x+1=0

x=-4, x=1, x=-1


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