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Simplifying 4x2 = 16x + -20 Reorder the terms: 4x2 = -20 + 16x Solving 4x2 = -20 + 16x Solving for variable 'x'. Reorder the terms: 20 + -16x + 4x2 = -20 + 16x + 20 + -16x Reorder the terms: 20 + -16x + 4x2 = -20 + 20 + 16x + -16x Combine like terms: -20 + 20 = 0 20 + -16x + 4x2 = 0 + 16x + -16x 20 + -16x + 4x2 = 16x + -16x Combine like terms: 16x + -16x = 0 20 + -16x + 4x2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(5 + -4x + x2) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(5 + -4x + x2)' equal to zero and attempt to solve: Simplifying 5 + -4x + x2 = 0 Solving 5 + -4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-5' to each side of the equation. 5 + -4x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + -4x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -4x + x2 = 0 + -5 -4x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 -4x + x2 = -5 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 = -5 + 4 Reorder the terms: 4 + -4x + x2 = -5 + 4 Combine like terms: -5 + 4 = -1 4 + -4x + x2 = -1 Factor a perfect square on the left side: (x + -2)(x + -2) = -1 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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