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calculati ab+ac si 2a+3b+3c stiind ca a=16 b+c=25


Răspuns :

2a + 3b + 3c = 2a + (b+c) x 3 = 32 + 75 = 107
ab + ac = a x (b+c) = 16 x 25 = 400
ab+ac=a(b+c)= 16*25=400 2a+3b+3c=16*2+3*25=32+75=107