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Simplifying 0 = 2x2 + 8x + 9 Reorder the terms: 0 = 9 + 8x + 2x2 Solving 0 = 9 + 8x + 2x2 Solving for variable 'x'. Combine like terms: 0 + -9 = -9 -9 + -8x + -2x2 = 9 + 8x + 2x2 + -9 + -8x + -2x2 Reorder the terms: -9 + -8x + -2x2 = 9 + -9 + 8x + -8x + 2x2 + -2x2 Combine like terms: 9 + -9 = 0 -9 + -8x + -2x2 = 0 + 8x + -8x + 2x2 + -2x2 -9 + -8x + -2x2 = 8x + -8x + 2x2 + -2x2 Combine like terms: 8x + -8x = 0 -9 + -8x + -2x2 = 0 + 2x2 + -2x2 -9 + -8x + -2x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 -9 + -8x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(9 + 8x + 2x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(9 + 8x + 2x2)' equal to zero and attempt to solve: Simplifying 9 + 8x + 2x2 = 0 Solving 9 + 8x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 4.5 + 4x + x2 = 0 Move the constant term to the right: Add '-4.5' to each side of the equation. 4.5 + 4x + -4.5 + x2 = 0 + -4.5 Reorder the terms: 4.5 + -4.5 + 4x + x2 = 0 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + 4x + x2 = 0 + -4.5 4x + x2 = 0 + -4.5 Combine like terms: 0 + -4.5 = -4.5 4x + x2 = -4.5 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 = -4.5 + 4 Reorder the terms: 4 + 4x + x2 = -4.5 + 4 Combine like terms: -4.5 + 4 = -0.5 4 + 4x + x2 = -0.5 Factor a perfect square on the left side: (x + 2)(x + 2) = -0.5 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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