1.Rozloz wielomian q(x)=(x-1)(x+3)(x+1)-3x-9 na czynniki liniowe i wyznacz jego pierwiastki.
q(x)=(x-1)(x+3)(x+1)-3x-9
q(x)=(x-1)(x+3)(x+1)-3(x+3)=(x+3)[(x-1)(x+1)-3]=(x+3)[(x^2-1)-3]=(x+3)(x^2-4)=(x+3(x-2)(x+2)
(x+3(x-2)(x+2)=0
x=-3 x=2 x=-2- pierwiastki wielomianu
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q(x)=(x-1)(x+3)(x+1)-3x-9
q(x)=(x-1)(x+3)(x+1)-3(x+3)=(x+3)[(x-1)(x+1)-3]=(x+3)[(x^2-1)-3]=(x+3)(x^2-4)=(x+3(x-2)(x+2)
(x+3(x-2)(x+2)=0
x=-3 x=2 x=-2- pierwiastki wielomianu