c) -x kwadrat + 20x >25
d)100x-4x kwadrat <300
(2) - kwadrat
^ - pierwiastek
c) - x(2) + 20x >25/:^
- x + 2^5x >5
x = 2,24
d) 100x - 4x < 300
96x < 300/:96
x = 312,5
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(2) - kwadrat
^ - pierwiastek
c) - x(2) + 20x >25/:^
- x + 2^5x >5
x = 2,24
d) 100x - 4x < 300
96x < 300/:96
x = 312,5