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DaveStrider666
@DaveStrider666
July 2022
1
6
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А) (2х+1)(х-1)=
б)(3 - у²)(у-4)=
в) а²+ (2-а)(а+5)=
г) (b-1)(b²+b-2)
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Answers & Comments
duglasdaun
(2x+1)(x-1)=2x²-2x+x-1=2x²-x-1
2x²-x-1=0
D=1+8=9=3²
x1,2=(1±3)/4=-1/2; 1
ответ: -1/2;
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Answers & Comments
2x²-x-1=0
D=1+8=9=3²
x1,2=(1±3)/4=-1/2; 1
ответ: -1/2;