If (where ), then the value of…

MATHEMATICS · Single correct · CBSE · Mathematics · Complex Numbers and Quadratic Equations · Complex Numbers and Quadratic Equations

Problem

If x=4+3ix = 4 + 3i (where i=−1i = \sqrt{-1}), then the value of x3−4x2−7x+12x^3 - 4x^2 - 7x + 12 equals: (a) −88-88 (b) 48+36i48 + 36i (c) −256+12i-256 + 12i (d) −84-84

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