Răspunsuri

2014-08-30T11:51:12+03:00
Ax(b+c)= axb+ axc=  1/7 + 3/21=   (3+3)/21=  6/21=  2/7
2014-08-30T12:25:46+03:00
A*b=1/7
a*c=3/21

a*b+a*c=1/7+3/21 (il simplificam pe 3/21 cu 3)
a*b+a*c=1/7+1/7 (dam factor comun)
a*(b+c)=2/7
si dacă-l vrei si ca fractii zecimala (periodica):
a*(b+c)= 0,(285714)
Succes la teme!

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