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aniutamalishev
@aniutamalishev
August 2022
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решите уравнение -x^2+5x+6=0
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*** Уравнение решено по теореме Виета
16 votes
Thanks 17
svyaz0295
-x^2+5x+6=0
x^2-5x-6=0
a=1;b=-5;c=-6
D=b^2-4ac
D=25-4*1*(-6)=25+24=49(x>0.2 корня)
x=-b+-корень из D\2a
x1=5+7\2
x1=12\2
x1=6
x2=5-7\2
x2=-2\2
x2=-1
Ответ:x1=6;x2=-1
13 votes
Thanks 22
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Verified answer
*** Уравнение решено по теореме Виета
x^2-5x-6=0
a=1;b=-5;c=-6
D=b^2-4ac
D=25-4*1*(-6)=25+24=49(x>0.2 корня)
x=-b+-корень из D\2a
x1=5+7\2
x1=12\2
x1=6
x2=5-7\2
x2=-2\2
x2=-1
Ответ:x1=6;x2=-1