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Simplifying 3x4 + 15x2 + 72 = 0 Reorder the terms: 72 + 15x2 + 3x4 = 0 Solving 72 + 15x2 + 3x4 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3'. 3(24 + 5x2 + x4) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(24 + 5x2 + x4)' equal to zero and attempt to solve: Simplifying 24 + 5x2 + x4 = 0 Solving 24 + 5x2 + x4 = 0 Begin completing the square. Move the constant term to the right: Add '-24' to each side of the equation. 24 + 5x2 + -24 + x4 = 0 + -24 Reorder the terms: 24 + -24 + 5x2 + x4 = 0 + -24 Combine like terms: 24 + -24 = 0 0 + 5x2 + x4 = 0 + -24 5x2 + x4 = 0 + -24 Combine like terms: 0 + -24 = -24 5x2 + x4 = -24 The x term is 5x2. 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. 5x2 + 6.25 + x4 = -24 + 6.25 Reorder the terms: 6.25 + 5x2 + x4 = -24 + 6.25 Combine like terms: -24 + 6.25 = -17.75 6.25 + 5x2 + x4 = -17.75 Factor a perfect square on the left side: (x2 + 2.5)(x2 + 2.5) = -17.75 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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