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-x(2x - 5) ≤ 0
M. zerowe:
x = 0 v x = 2,5
a < 0, to parabola zwrócona jest ramionami do dołu
x ∈ (-∞; 0 > U < 2,5; +∞)
2.
3(x + 6)² ≤ 0 /:3
M. zerowe:
3(x + 6)² = 0 /:3
(x + 6)² = 0
x = -6
a > 0, to parabola zwrócona jest ramionami do góry
x = -6