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Simplifying 4x2 + 5x + -1k = 0 Reorder the terms: -1k + 5x + 4x2 = 0 Solving -1k + 5x + 4x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-5x' to each side of the equation. -1k + 5x + -5x + 4x2 = 0 + -5x Combine like terms: 5x + -5x = 0 -1k + 0 + 4x2 = 0 + -5x -1k + 4x2 = 0 + -5x Remove the zero: -1k + 4x2 = -5x Add '-4x2' to each side of the equation. -1k + 4x2 + -4x2 = -5x + -4x2 Combine like terms: 4x2 + -4x2 = 0 -1k + 0 = -5x + -4x2 -1k = -5x + -4x2 Divide each side by '-1'. k = 5x + 4x2 Simplifying k = 5x + 4x2
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