andreich97
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Разложите на множители (b+4)^2+6(b+4)

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Б²+8б+16+6б+24=б²+14б+40
larazaytseva

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sleek73
1a)x^25x-6 \\ x^2-5x+60
строим график функции y=x^2-5x+6
это парабола с центром в точке (2,5; -0,25) и ветвями вверх
она пересекает ось Ох в точках 2 и 3 (см. рисунок 1)
ответ: х ∈(-∞;2) U (3; +∞)
1б) x^2-4x+40 \\ (x-2)^20
это парабола с центром в точке (0; 2) и ветвями вверх (см. рисунок 2)
она вся лежит выше оси Ох, кроме х=2, в этой точке достигается равенство, но т.к. неравенство строгое, из ответа эту точку "выкалываем"
ответ: х∈(-∞; 2) U (2; +∞)
2) выкалываем на числовой оси точки, которые обращают левую часть неравенства в ноль. Х1=-3; Х2=5; Х3=8. Расставляем знаки на получившихся промежутках (см. рисунок 3). Т.к. в неравенстве знак "меньше", выбираем промежутки с "минусом".
ответ: х ∈ (-3; 5) U (5; 8)
Решить графически неравенства. а)x^2> 5x-6 б)x^2-4x+4> 0 2)решите методом интервала. а)(x-8)(x
Решить графически неравенства. а)x^2> 5x-6 б)x^2-4x+4> 0 2)решите методом интервала. а)(x-8)(x
Решить графически неравенства. а)x^2> 5x-6 б)x^2-4x+4> 0 2)решите методом интервала. а)(x-8)(x

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