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Simplifying x2 + kx + 3x = 0 Reorder the terms: kx + 3x + x2 = 0 Solving kx + 3x + x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-3x' to each side of the equation. kx + 3x + -3x + x2 = 0 + -3x Combine like terms: 3x + -3x = 0 kx + 0 + x2 = 0 + -3x kx + x2 = 0 + -3x Remove the zero: kx + x2 = -3x Add '-1x2' to each side of the equation. kx + x2 + -1x2 = -3x + -1x2 Combine like terms: x2 + -1x2 = 0 kx + 0 = -3x + -1x2 kx = -3x + -1x2 Divide each side by 'x'. k = -3 + -1x Simplifying k = -3 + -1x
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