Complex Roots of Quadratic Equations - English

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Imaginary number, i = sqrt (-1) Complex numbers in XY plane Complex numbers in complex plane Quadratic polynomials and parabolic functions Creating sliders, a, b and c, to look at different quadratic equations Effects of coefficients, a, b and c, on parabolic functions Finding roots using coefficients in quadratic equations Finding vertex (extremum) from formula for roots of quadratic equations Real and complex roots of a quadratic polynomial using Spreadsheet view Changes in discriminants for real and complex roots in Spreadsheet view