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$I f x = 3 + i t h e n t h e v a l u e o f x^{3} - 3 x^{2} - 8 x + 15$

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Correct option is A

Given x=3+i x-3=i squaring on both sides x-32=-1 x2-6x+9=-1 x2-6x+10=0x3-3x2-8x-15=xx2-3x-8+15 =x6x-10-3x-8+15 =x3x-18+15 =3x2-18x+15 =36x-10-18x+15 =-30+15 =-15

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If x=3+i then the value of x3-3x2-8x+15

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$I f x = 3 + i t h e n t h e v a l u e o f x^{3} - 3 x^{2} - 8 x + 15$