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Simplifying 3x2 + -12x + 84 = 0 Reorder the terms: 84 + -12x + 3x2 = 0 Solving 84 + -12x + 3x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3'. 3(28 + -4x + x2) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(28 + -4x + x2)' equal to zero and attempt to solve: Simplifying 28 + -4x + x2 = 0 Solving 28 + -4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-28' to each side of the equation. 28 + -4x + -28 + x2 = 0 + -28 Reorder the terms: 28 + -28 + -4x + x2 = 0 + -28 Combine like terms: 28 + -28 = 0 0 + -4x + x2 = 0 + -28 -4x + x2 = 0 + -28 Combine like terms: 0 + -28 = -28 -4x + x2 = -28 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = -28 + 4 Reorder the terms: 4 + -4x + x2 = -28 + 4 Combine like terms: -28 + 4 = -24 4 + -4x + x2 = -24 Factor a perfect square on the left side: (x + -2)(x + -2) = -24 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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