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Simplifying x2 + kx + 18 = 0 Reorder the terms: 18 + kx + x2 = 0 Solving 18 + kx + x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + kx + -18 + x2 = 0 + -18 Reorder the terms: 18 + -18 + kx + x2 = 0 + -18 Combine like terms: 18 + -18 = 0 0 + kx + x2 = 0 + -18 kx + x2 = 0 + -18 Combine like terms: 0 + -18 = -18 kx + x2 = -18 Add '-1x2' to each side of the equation. kx + x2 + -1x2 = -18 + -1x2 Combine like terms: x2 + -1x2 = 0 kx + 0 = -18 + -1x2 kx = -18 + -1x2 Divide each side by 'x'. k = -18x-1 + -1x Simplifying k = -18x-1 + -1x
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