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Se stie ca a=11 si b+c=8.Calculati

a) a×b+a×c=
b)2×a+3×b+3×c=
c)10×a+9×b+9×c=
d)8a+8b+8c=


Răspuns :

axb+axc= a(b+c)= 11x8=88
2xa+3xb+3xc=2xa+3(b+c)= 2xa+3x8= 2x11+24= 22+24= 46
10xa+9xb+9xc= 10xa +9(b+c) = 10x11+9x8= 110+72= 182
8a+8b+8c=8(a+b+c)= 8x 11+8= 88+8 = 98
Sper ca te-am ajutat!