Explicație pas cu pas:
ღSalutare!ღ
2,5²+1,2×{11+1,1×[6,5+2×(8,65-8,6)]} =
= 6,25+1,2×[11+1,1×(6,5+2×0,05)] =
= 6,25+1,2×[11+1,1×(6,5+0,1)] =
= 6,25+1,2×(11+1,1×6,6) =
= 6,25+1,2×(11+7,26) =
= 6,25+1,2×18,26 =
= 6,25+21,912 =
= 28,162
Succes!;)
