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deder778
@deder778
July 2022
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решите уравнение хво второй степени -8х +15=0
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lara164
Verified answer
Х²-8х +15 =0
D/4 = 16 -15 =1
x₁=4-1=3
х₂=4+1=5
Ответ: {3; 5}
2 votes
Thanks 1
seidov05
X^2-8x+15=0 a=1;b=-8;c=15
D=b^2-4ac=(-8)^2-4*1*15=64-60=4
x1=-b+корень 4/2a=8+2/2=5
x2=-b-корень 4/2a=8-2/2=3
Ответ:x1=5; x2=3
2 votes
Thanks 2
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Answers & Comments
Verified answer
Х²-8х +15 =0D/4 = 16 -15 =1
x₁=4-1=3
х₂=4+1=5
Ответ: {3; 5}
D=b^2-4ac=(-8)^2-4*1*15=64-60=4
x1=-b+корень 4/2a=8+2/2=5
x2=-b-корень 4/2a=8-2/2=3
Ответ:x1=5; x2=3