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Simplifying x * x + k * x + 30 = 0 Multiply x * x x2 + k * x + 30 = 0 Multiply k * x x2 + kx + 30 = 0 Reorder the terms: 30 + kx + x2 = 0 Solving 30 + kx + x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + kx + -30 + x2 = 0 + -30 Reorder the terms: 30 + -30 + kx + x2 = 0 + -30 Combine like terms: 30 + -30 = 0 0 + kx + x2 = 0 + -30 kx + x2 = 0 + -30 Combine like terms: 0 + -30 = -30 kx + x2 = -30 Add '-1x2' to each side of the equation. kx + x2 + -1x2 = -30 + -1x2 Combine like terms: x2 + -1x2 = 0 kx + 0 = -30 + -1x2 kx = -30 + -1x2 Divide each side by 'x'. k = -30x-1 + -1x Simplifying k = -30x-1 + -1x
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