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ElizabethJNr
@ElizabethJNr
July 2022
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решите уравнение (-2x+5)(-4х-9)=0
Даю 20 баллов
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Лена135
(-2х+5)(-4х-9)=0
8x^2+18x-20x-45=0
8x^2-2x-45=0
D=4+1440=1444=38^2
x1=(2+38)/16=40/16=2.5
x2=(2-38)/16=-36/16=-2.25
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Answers & Comments
8x^2+18x-20x-45=0
8x^2-2x-45=0
D=4+1440=1444=38^2
x1=(2+38)/16=40/16=2.5
x2=(2-38)/16=-36/16=-2.25