Find the roots of (D4 +D²+1) 0 a 1± √3 1± √√√3 2 2 =1=Fܪܝ ܘO b. -1± √√3 -1± √3 2 2 0²1+√√√3 -1±i√3 0d1 ± √3-1 ± √3 O e. none

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