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Simplifying -2x(x + 1) = 4 Reorder the terms: -2x(1 + x) = 4 (1 * -2x + x * -2x) = 4 (-2x + -2x2) = 4 Solving -2x + -2x2 = 4 Solving for variable 'x'. Reorder the terms: -4 + -2x + -2x2 = 4 + -4 Combine like terms: 4 + -4 = 0 -4 + -2x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '-2'. -2(2 + x + x2) = 0 Ignore the factor -2.Subproblem 1
Set the factor '(2 + x + x2)' equal to zero and attempt to solve: Simplifying 2 + x + x2 = 0 Solving 2 + x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-2' to each side of the equation. 2 + x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x + x2 = 0 + -2 x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 x + x2 = -2 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. x + 0.25 + x2 = -2 + 0.25 Reorder the terms: 0.25 + x + x2 = -2 + 0.25 Combine like terms: -2 + 0.25 = -1.75 0.25 + x + x2 = -1.75 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -1.75 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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