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25x²-78-0,5x=25x²+50x+25
-50,5x=103
x=-2,04
25xkw.-4-78-0,5x+4=25(xkw. +2x + 1)
25xkw.-78-0,5x=25xkw+50x+25
-78-0,5x=50x+25
-78=50.5x+25
50.5x=103
x=2,03960396039
9,5x-74=25x+1kw
-5,1x-73
-5,1x=-73 /:[-5,1]
x=15