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chirkov200448
@chirkov200448
July 2022
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10-2x^2=2(x-1)^2 (без корня) 7класс
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PalaxiK
Смотри.........,...............
2 votes
Thanks 1
chirkov200448
можете еще решить? 9-3х^2=3(х-3)^2
Мартын05
10-2x^2=2(x-1)^2;
10-2x^2=2x^2-4x+2;
4x^2-4x-8=0;
(4x^2-4x-8+9)-9=0;
(2x-1)^2-9=0;
(2x-1)^2=9;
1) 2x-1=3;
2x=4;
x1=2;
2)2x-1=-3;
2x=-2;
x2=-1;
1 votes
Thanks 2
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Answers & Comments
10-2x^2=2x^2-4x+2;
4x^2-4x-8=0;
(4x^2-4x-8+9)-9=0;
(2x-1)^2-9=0;
(2x-1)^2=9;
1) 2x-1=3;
2x=4;
x1=2;
2)2x-1=-3;
2x=-2;
x2=-1;