Ответы на вопрос:
1. {4x²+5x-6 > 0 {4x > 0 1) 4x²+5x-6 > 0 d = 25+96 = 121 x₁,₂ = (-5⁺₋11)/8 = 0,75; -2 + - + ₀₀> x \\\\\\\\\ -2 0,75\\\\\\\\\\\\\\ 2) 7x > 0 x > 0 ₀> x 0/////////////////// 3) \\\\\\\\\\ -2 0,75\\\\\\\\\\\\\\ ₀₀₀> x 0/////////////////////////// x∈(0,75; ∞) 2. { х² -16 < 0 {2x ≥ 181) x²-16 < 0 (x-4)(x+4) < 0 x₁ = 4; x₂ = -4 + - + ₀₀> x -4///////////4 2) 2x ≥ 18 x ≥ 9 > x 9\\\\\\\\\\\\\\\\\\\ 3) -4///////////4 ₀₀> x 9\\\\\\\\\\\\\\\\ система решений не имеет
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