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Simplifying -2x2 + -10x + -12 = 4 Reorder the terms: -12 + -10x + -2x2 = 4 Solving -12 + -10x + -2x2 = 4 Solving for variable 'x'. Reorder the terms: -12 + -4 + -10x + -2x2 = 4 + -4 Combine like terms: -12 + -4 = -16 -16 + -10x + -2x2 = 4 + -4 Combine like terms: 4 + -4 = 0 -16 + -10x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '-2'. -2(8 + 5x + x2) = 0 Ignore the factor -2.Subproblem 1
Set the factor '(8 + 5x + x2)' equal to zero and attempt to solve: Simplifying 8 + 5x + x2 = 0 Solving 8 + 5x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-8' to each side of the equation. 8 + 5x + -8 + x2 = 0 + -8 Reorder the terms: 8 + -8 + 5x + x2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 5x + x2 = 0 + -8 5x + x2 = 0 + -8 Combine like terms: 0 + -8 = -8 5x + x2 = -8 The x term is 5x. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5x + 6.25 + x2 = -8 + 6.25 Reorder the terms: 6.25 + 5x + x2 = -8 + 6.25 Combine like terms: -8 + 6.25 = -1.75 6.25 + 5x + x2 = -1.75 Factor a perfect square on the left side: (x + 2.5)(x + 2.5) = -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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