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1,8 la a doua + 3ori[4,6-2,5(1-0,7)]

Răspuns :

1,8² + 3×[4,6-2,5(1-0,7)] =
=
3,24 + 3×(4,6-2,5×0,3) =
=3,24 + 3×(4,6-0,75) =
=3,24 + 3×3,85 =
=3,24+11,55=14,75