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F1staShka
@F1staShka
September 2021
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решить : -3х²+9х-2>2/3
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KarinaYouchi
-3x^2+9x-2>2\3
-3x^2+9x-2-2\3>0
-3x^2+9x-8\3>0 |*(-1)
3x^2-9x+8\3<0
3x^2-9x+8\3=0
D=(-9)^2-4*3*8\3=81-32=49
x1=9+√49=9+7=8\3
2*3 6
x2=9-√49=9-7=1\3
2*3 6
3(x-8\3)(x-1\3)=(3x-8)(x-1\3)
(3x-8)(x-1\3)<0
+ - +
/////////////////////////////////////////
------------(1\3)------------------------------------(8\3)------------------------
Ответ:(1\3;8\3)
1 votes
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Answers & Comments
-3x^2+9x-2-2\3>0
-3x^2+9x-8\3>0 |*(-1)
3x^2-9x+8\3<0
3x^2-9x+8\3=0
D=(-9)^2-4*3*8\3=81-32=49
x1=9+√49=9+7=8\3
2*3 6
x2=9-√49=9-7=1\3
2*3 6
3(x-8\3)(x-1\3)=(3x-8)(x-1\3)
(3x-8)(x-1\3)<0
+ - +
/////////////////////////////////////////
------------(1\3)------------------------------------(8\3)------------------------
Ответ:(1\3;8\3)