Odpowiedzi

2010-02-15T17:43:12+01:00
28x17-28-15= 28x(17-15) = 28x2=56.
134x135-133x135= 135x(134-133)= 135
31x15-62x7= 31x(15-2x7) = 31x(15-14) =31.
12x13-6x26 = 6x(2x13-6x26) =6x(26-26)= 0.
13x49-26x27= 13x(49-2x27)= 13(49-54)= 13x(-5) = -65
57[2potega] -57x55 = 57x(55-55) = 57x2 = 114


Proszę ;p
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