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18. Obtain all the zeros of f(x)=x4-3x3-x2+9x-6.If two of its zeros are (-?3) and +?3. (3marks) |
 So x2-3x+2 = 0 ie, (x-2)(x-1)=0 x= 2 or 1 Hence the zeros are -root3 , +root3 ,2 , 1. |
