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Simplifying 4x2 + -20x + 25 = -7 Reorder the terms: 25 + -20x + 4x2 = -7 Solving 25 + -20x + 4x2 = -7 Solving for variable 'x'. Reorder the terms: 25 + 7 + -20x + 4x2 = -7 + 7 Combine like terms: 25 + 7 = 32 32 + -20x + 4x2 = -7 + 7 Combine like terms: -7 + 7 = 0 32 + -20x + 4x2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(8 + -5x + x2) = 0 Ignore the factor 4.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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