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Simplifying (4x2 + x + -7) + (3x + 9) = 0 Reorder the terms: (-7 + x + 4x2) + (3x + 9) = 0 Remove parenthesis around (-7 + x + 4x2) -7 + x + 4x2 + (3x + 9) = 0 Reorder the terms: -7 + x + 4x2 + (9 + 3x) = 0 Remove parenthesis around (9 + 3x) -7 + x + 4x2 + 9 + 3x = 0 Reorder the terms: -7 + 9 + x + 3x + 4x2 = 0 Combine like terms: -7 + 9 = 2 2 + x + 3x + 4x2 = 0 Combine like terms: x + 3x = 4x 2 + 4x + 4x2 = 0 Solving 2 + 4x + 4x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '2'. 2(1 + 2x + 2x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(1 + 2x + 2x2)' equal to zero and attempt to solve: Simplifying 1 + 2x + 2x2 = 0 Solving 1 + 2x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 0.5 + x + x2 = 0 Move the constant term to the right: Add '-0.5' to each side of the equation. 0.5 + x + -0.5 + x2 = 0 + -0.5 Reorder the terms: 0.5 + -0.5 + x + x2 = 0 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x + x2 = 0 + -0.5 x + x2 = 0 + -0.5 Combine like terms: 0 + -0.5 = -0.5 x + x2 = -0.5 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + x2 = -0.5 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + x2 = -0.5 + 0.25 Combine like terms: -0.5 + 0.25 = -0.25 1.25 + x2 = -0.25 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -0.25 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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