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Simplifying (k + 3) * x2 + 2x + -1 = 0 Reorder the terms: (3 + k) * x2 + 2x + -1 = 0 Reorder the terms for easier multiplication: x2(3 + k) + 2x + -1 = 0 (3 * x2 + k * x2) + 2x + -1 = 0 Reorder the terms: (kx2 + 3x2) + 2x + -1 = 0 (kx2 + 3x2) + 2x + -1 = 0 Reorder the terms: -1 + kx2 + 2x + 3x2 = 0 Solving -1 + kx2 + 2x + 3x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '1' to each side of the equation. -1 + kx2 + 2x + 1 + 3x2 = 0 + 1 Reorder the terms: -1 + 1 + kx2 + 2x + 3x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + kx2 + 2x + 3x2 = 0 + 1 kx2 + 2x + 3x2 = 0 + 1 Combine like terms: 0 + 1 = 1 kx2 + 2x + 3x2 = 1 Add '-2x' to each side of the equation. kx2 + 2x + -2x + 3x2 = 1 + -2x Combine like terms: 2x + -2x = 0 kx2 + 0 + 3x2 = 1 + -2x kx2 + 3x2 = 1 + -2x Add '-3x2' to each side of the equation. kx2 + 3x2 + -3x2 = 1 + -2x + -3x2 Combine like terms: 3x2 + -3x2 = 0 kx2 + 0 = 1 + -2x + -3x2 kx2 = 1 + -2x + -3x2 Divide each side by 'x2'. k = x-2 + -2x-1 + -3 Simplifying k = x-2 + -2x-1 + -3 Reorder the terms: k = -3 + x-2 + -2x-1
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