MathematicsMedium53×since 2002Q3221If the equation, x² + bx + 45 = 0 (b ∈\in∈ R) has conjugate complex roots and they satisfy |z +1| = 210\sqrt {10}10 , then :Ab² – b = 42Bb² + b = 12Cb² + b = 72Db² – b = 30Check answerSkip