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Simplifying 2x2 + kx + 15 = 0 Reorder the terms: 15 + kx + 2x2 = 0 Solving 15 + kx + 2x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + kx + -15 + 2x2 = 0 + -15 Reorder the terms: 15 + -15 + kx + 2x2 = 0 + -15 Combine like terms: 15 + -15 = 0 0 + kx + 2x2 = 0 + -15 kx + 2x2 = 0 + -15 Combine like terms: 0 + -15 = -15 kx + 2x2 = -15 Add '-2x2' to each side of the equation. kx + 2x2 + -2x2 = -15 + -2x2 Combine like terms: 2x2 + -2x2 = 0 kx + 0 = -15 + -2x2 kx = -15 + -2x2 Divide each side by 'x'. k = -15x-1 + -2x Simplifying k = -15x-1 + -2x
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