a) x1+x2=-5/2=-2,5
x1*x2=-3/2=-1.5
x1+x2+x1x2=-2,5-1,5=-4
x1^3+x2^3=(x1+x2)((x1+x2)^2-3x1x2)=-2,5*(6,25+4,5)=-26,875
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a) x1+x2=-5/2=-2,5
x1*x2=-3/2=-1.5
x1+x2+x1x2=-2,5-1,5=-4
x1^3+x2^3=(x1+x2)((x1+x2)^2-3x1x2)=-2,5*(6,25+4,5)=-26,875