MathematicsEasy53×since 2002Q3222If α\alphaα, β\betaβ ∈\in∈ R are such that 1 −-− 2i (here i² = −-−1) is a root of z² + α\alphaαz + β\betaβ = 0, then (α\alphaα −-− β\betaβ) is equal to :A−-−7B7C3D−-−3Check answerSkip