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daca  a×b=36si ac=27 atunci calculati  a×(b+c),a×(b-c)



Răspuns :

a( b+c) = ab + ac = 36 + 27 = 63
a( b-c ) = ab -  ac = 36 - 27  = 9
ax(b+c)=axb+axc=36+27=63
ax(b-c)=axb-axc=36-27=9