Răspunsuri

2014-07-16T16:36:32+03:00
A)a*b+a*c= a(b+c)=  -2/5 +1/3  aducem la acelasi numitor

a(b+c)= (-6+5)/15= -1/15

b)a*b-a*c=a(b-c)= -2/5-1/3  aducem la acelasi numitor

a(b-c)= (-6-5)/15= -11/15
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