1. Определите нули левой части неравенства
2(х – 5)(2х + 1) > 0
x-5=0 x=5
2x+1=0 x=-0,5
4(x-5)(x+0.5)>0
+ - +
______-0.5________5______
x∈(-∞; -0.5)∪(5; +∞)
2.Решите неравенство (2х – 5)(х + 3) > 0
2(x-2.5)(x+3)>0
_____-3______2.5______
x∈(-∞; -3)∪(2,5; +∞)
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1. Определите нули левой части неравенства
2(х – 5)(2х + 1) > 0
x-5=0 x=5
2x+1=0 x=-0,5
2(х – 5)(2х + 1) > 0
4(x-5)(x+0.5)>0
+ - +
______-0.5________5______
x∈(-∞; -0.5)∪(5; +∞)
2.Решите неравенство (2х – 5)(х + 3) > 0
2(x-2.5)(x+3)>0
+ - +
_____-3______2.5______
x∈(-∞; -3)∪(2,5; +∞)