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-3,4(4-1pe6)-(-1)×[(4-1pe6)×3,4]
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Răspuns :

-3,4(4-1/6)-(-1)x[(4-1/6)x3,4=-3,4x23/6+1x(23/6)x3,4=-3,4x23/6+3.4x23/6=0
-3,4·(4 - 1/6) - (-1)·[(4 - 1/6)·3,4] =

= -3.4·[(24 - 1)/6] - (-1)·[(24-1)/6·3.4]

= -3,4·23/6 +(23/6)·3,4

=0