11x - 2 > 9
11x > 9 + 2
11x > 11
x > 1
2 - 3y ≥ -4
-3y ≥ -4 - 2
-3y ≥ -6
y ≤ 2
17 - x ≤ 11
-x ≤ 11 - 17
-x ≤ -6
x ≥ 6
x² - 64 < 0
(x - 8)(x + 8) < 0
-8 < x < 8
(x + 8)(x - 3) ≥ 0
x ≤ -8 или x ≥ 3
5(x - 1) + 8 ≤ 1 - 3(x + 2)
5x - 5 + 8 ≤ 1 - 3x - 6
5x + 3 ≤ -3x - 5
8x ≤ -8
x ≤ -1
4(a + 8) - 7(a - 1) < 12
4a + 32 - 7a + 7 < 12
-3a + 39 < 12
-3a < -27
a > 9
4(b - 1.5) - 1.2 ≥ 6b - 1
4b - 6 - 1.2 ≥ 6b - 1
4b - 7.2 ≥ 6b - 1
-2b ≥ 6.2
b ≤ -3.1
4x² + 3x - 10 < 0
Находим дискриминант: D = 3² - 4 * 4 * (-10) = 9 + 160 = 169
x₁ = (-3 + √169) / (2 * 4) = (-3 + 13) / 8 = 10 / 8 = 5 / 4 = 1.25
x₂ = (-3 - √169) / (2 * 4) = (-3 - 13) / 8 = -16 / 8 = -2
-2 < x < 1.25
-2x² + 5x + 12 > 0
2x² - 5x - 12 < 0
Находим дискриминант: D = (-5)² - 4 * 2 * (-12) = 25 + 96 = 121
x₁ = (5 + √121) / (2 * 2) = (5 + 11) / 4 = 16 / 4 = 4
x₂ = (5 - √121) / (2 * 2) = (5 - 11) / 4 = -6 / 4 = -3 / 2 = -1.5
-1.5 < x < 4
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