proszę o rozwiązanie
2x^2 + x = 0
x( x + 1) = 0
x= 0 lub x= -1
-2x^2 + 5 =< 0
-2x^2 =< -5
x^2 >= 5/2
nies=> x >= pier{5/2}
-nies=< x =< -pier{5/2}
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2x^2 + x = 0
x( x + 1) = 0
x= 0 lub x= -1
-2x^2 + 5 =< 0
-2x^2 =< -5
x^2 >= 5/2
nies=> x >= pier{5/2}
-nies=< x =< -pier{5/2}