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Prove that z1 + z2 = -a, z1 × z2 = b , if z1 and z2 -roots of the equation z^2+ a × z + b = 0 with arbitrary complex coefficients a and b .?

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  • Prove that z1 + z2 = -a, z1 × z2 = b , if z1 and z2 -roots of the equation z^2+ a × z + b = 0 with arbitrary complex coefficients a and b .?


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