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Stiind ca a×b= 8 si a×c= 16, calculeaza 10×a×(b+c)
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Răspuns :

10×a×(b+c)=10×a×b+10×a×c=10×8+10×16=80+160=240

ab=8, ac=16

10a(b+c)=10ab+10ac=80+160=240