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gidzidzdzidziizodz
@gidzidzdzidziizodz
March 2022
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решить неравенство графическим способом х^2+7х+10≧0
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anassstass
Х² + 7х + 10 ≥ 0
х² + 7х + 10 = 0
D = 49-10*4 = 9 = 3²
x₁ = -7-3/2 = -5
x₂ = -7+3/2 = -2
х² + 7х + 10 = (x+5)(x+2)
(x+5)(x+2) ≥ 0
__+__(-5)___-___(-2)__+__>
Ответ: (-∞; -5] ∪ [-2; +∞)
4 votes
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Answers & Comments
х² + 7х + 10 = 0
D = 49-10*4 = 9 = 3²
x₁ = -7-3/2 = -5
x₂ = -7+3/2 = -2
х² + 7х + 10 = (x+5)(x+2)
(x+5)(x+2) ≥ 0
__+__(-5)___-___(-2)__+__>
Ответ: (-∞; -5] ∪ [-2; +∞)