rozwiąż równianie :
2x kwadrat + (x+5)kwadrat - 2(x+7)kwadrat = 2(3x - 72.5) + (x-6)kwadrat
2x kwadrat + x kwadrat +10x + 25 -2(x kwadrat +14x +49)=6x-145+x kwadrat-12x+36
2x kwadrat+x kwadrat +10x - 2x kwadrat - 24x - 6x - x kwadrat+12x= -145 +36-25+98
-2x = - 36
x=18
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2x kwadrat + (x+5)kwadrat - 2(x+7)kwadrat = 2(3x - 72.5) + (x-6)kwadrat
2x kwadrat + x kwadrat +10x + 25 -2(x kwadrat +14x +49)=6x-145+x kwadrat-12x+36
2x kwadrat+x kwadrat +10x - 2x kwadrat - 24x - 6x - x kwadrat+12x= -145 +36-25+98
-2x = - 36
x=18