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lollollol20101
@lollollol20101
July 2022
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Упростите выражение 2х(х+1)-(x^2-3)
Решите уравнение (х+2)(х-8)=6х
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nomdauteur
Verified answer
1. Раскроем скобки: 2x^2 + 2x - x^2 + 3 = x^2 + 2x + 3
2. Раскроем скобки:
x^2 - 6x - 16 = 6x
То есть: x^2 - 12x - 16 = 0
D = 12^2 + 16*4 = 208
x = (12
) / 2 = (6
)
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nomdauteur
(В смысле не х1, а х, очепятка.)
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Answers & Comments
Verified answer
1. Раскроем скобки: 2x^2 + 2x - x^2 + 3 = x^2 + 2x + 32. Раскроем скобки:
x^2 - 6x - 16 = 6x
То есть: x^2 - 12x - 16 = 0
D = 12^2 + 16*4 = 208
x = (12 ) / 2 = (6 )