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2014-05-28T21:59:47+03:00
P/100·25=32
25p/100=32
p=32·100/25=128
128%-100%=28%
cu 28% a crescut alocatia 
verificare
28/100·25=7 lei
25+7=32 lei
2) (2x-5)(5+2x)  (2x+1)²
10x+4x²-25-10x≤4x²+4x+1
4x²-4x²-4x≤25+1
-4x≤26   ·-1
x≥26/4
x≥13/2
nu are soluti pt.ca apartine multimii nr.rationale Q


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