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Simplifying 0 = x2 + 3x + 28 Reorder the terms: 0 = 28 + 3x + x2 Solving 0 = 28 + 3x + x2 Solving for variable 'x'. Combine like terms: 0 + -28 = -28 -28 + -3x + -1x2 = 28 + 3x + x2 + -28 + -3x + -1x2 Reorder the terms: -28 + -3x + -1x2 = 28 + -28 + 3x + -3x + x2 + -1x2 Combine like terms: 28 + -28 = 0 -28 + -3x + -1x2 = 0 + 3x + -3x + x2 + -1x2 -28 + -3x + -1x2 = 3x + -3x + x2 + -1x2 Combine like terms: 3x + -3x = 0 -28 + -3x + -1x2 = 0 + x2 + -1x2 -28 + -3x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -28 + -3x + -1x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(28 + 3x + x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(28 + 3x + x2)' equal to zero and attempt to solve: Simplifying 28 + 3x + x2 = 0 Solving 28 + 3x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-28' to each side of the equation. 28 + 3x + -28 + x2 = 0 + -28 Reorder the terms: 28 + -28 + 3x + x2 = 0 + -28 Combine like terms: 28 + -28 = 0 0 + 3x + x2 = 0 + -28 3x + x2 = 0 + -28 Combine like terms: 0 + -28 = -28 3x + x2 = -28 The x term is 3x. Take half its coefficient (1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. 3x + 2.25 + x2 = -28 + 2.25 Reorder the terms: 2.25 + 3x + x2 = -28 + 2.25 Combine like terms: -28 + 2.25 = -25.75 2.25 + 3x + x2 = -25.75 Factor a perfect square on the left side: (x + 1.5)(x + 1.5) = -25.75 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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