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Ayasha111
@Ayasha111
August 2022
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докажите, что (a+c)(b+c)+(a-c)(b-c)=0, если ab+c²=0
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alloeley
Я точно помню, что если a+b+c=0, то x1=1, а x2=c/a. И если a+c=b, то x1=-1, а x2=-c/a.
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