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директриса y=(-3x^2-2x+6)/5

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x²+4x+3=0

Solution

x=−1, x=−3

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Дополнение до полного квадрата

Формула корней квадратного уравнения

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x²+4x+3=0

Переместите 3 вправо

x²+4x=−3

Перепишите в виде (x+a)²=b

(x+2)²=1

Для f²(x)=a решения f(x)=√a, −√a

Решить x+2=√1: x=−1

Решить x+2=−√1: x=−3

Решением квадратного уравнения являются:

x=−1, x=−3

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−▭▭	<	7	8	9	÷	`AC`
+▭▭	>	4	5	6	×	☐☐☐
×▭▭	(	1	2	3	−	`x`
▭ \|▭	)	.	0	=	+	`y`

директриса y=(-3x^2-2x+6)/5

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