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golubchikp
@golubchikp
July 2022
1
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Разложи на множители (x+19y)^2−(19x+y)^2
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koba80
(х+19у)^2-(19х+у)^2=х^2+38ху+361у^2-361х^2-38ху-у^2=360у^2-360х^2=360(у^2-х^2)=360(у-х)(у+х)
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