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Simplifying 4x2 + 20x + k = 0 Reorder the terms: k + 20x + 4x2 = 0 Solving k + 20x + 4x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-20x' to each side of the equation. k + 20x + -20x + 4x2 = 0 + -20x Combine like terms: 20x + -20x = 0 k + 0 + 4x2 = 0 + -20x k + 4x2 = 0 + -20x Remove the zero: k + 4x2 = -20x Add '-4x2' to each side of the equation. k + 4x2 + -4x2 = -20x + -4x2 Combine like terms: 4x2 + -4x2 = 0 k + 0 = -20x + -4x2 k = -20x + -4x2 Simplifying k = -20x + -4x2
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