Cosx=-1/4

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Solution for Cosx=-1/4 equation: 


116;17223;232;17223;0;0

3;4;1;2;13;5

1;2;232;17223;0;0

3;4;1;2;2;0

1*x^4+2*x^3-(7*x^2)-(8*x)+12 = 0

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