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dau coroana pt norocosi

Dau Coroana Pt Norocosi class=

Răspuns :

a=-0,47
b=3

a) a·b= (-0,47)·3=-1,41
b) a^2+b^2= (-0,47)^2 +3^2= 0,220+9= 9,220
a^2-b^2= 0,220-9=-8,77
c)a^2+2ab+b^2=0,220-2,82+9=6,4
(a+b)^2=(-0.47+3)^2=(2,53)^2=6,40
d)a^3+3a^2b+3ab^2+b^3=-0,1034+1,98-12,69+27=16,18