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Simplifying 0 = 6x2 + 8x + 7 Reorder the terms: 0 = 7 + 8x + 6x2 Solving 0 = 7 + 8x + 6x2 Solving for variable 'x'. Combine like terms: 0 + -7 = -7 -7 + -8x + -6x2 = 7 + 8x + 6x2 + -7 + -8x + -6x2 Reorder the terms: -7 + -8x + -6x2 = 7 + -7 + 8x + -8x + 6x2 + -6x2 Combine like terms: 7 + -7 = 0 -7 + -8x + -6x2 = 0 + 8x + -8x + 6x2 + -6x2 -7 + -8x + -6x2 = 8x + -8x + 6x2 + -6x2 Combine like terms: 8x + -8x = 0 -7 + -8x + -6x2 = 0 + 6x2 + -6x2 -7 + -8x + -6x2 = 6x2 + -6x2 Combine like terms: 6x2 + -6x2 = 0 -7 + -8x + -6x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(7 + 8x + 6x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(7 + 8x + 6x2)' equal to zero and attempt to solve: Simplifying 7 + 8x + 6x2 = 0 Solving 7 + 8x + 6x2 = 0 Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. 1.166666667 + 1.333333333x + x2 = 0 Move the constant term to the right: Add '-1.166666667' to each side of the equation. 1.166666667 + 1.333333333x + -1.166666667 + x2 = 0 + -1.166666667 Reorder the terms: 1.166666667 + -1.166666667 + 1.333333333x + x2 = 0 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + 1.333333333x + x2 = 0 + -1.166666667 1.333333333x + x2 = 0 + -1.166666667 Combine like terms: 0 + -1.166666667 = -1.166666667 1.333333333x + x2 = -1.166666667 The x term is 1.333333333x. Take half its coefficient (0.6666666665). Square it (0.4444444442) and add it to both sides. Add '0.4444444442' to each side of the equation. 1.333333333x + 0.4444444442 + x2 = -1.166666667 + 0.4444444442 Reorder the terms: 0.4444444442 + 1.333333333x + x2 = -1.166666667 + 0.4444444442 Combine like terms: -1.166666667 + 0.4444444442 = -0.7222222228 0.4444444442 + 1.333333333x + x2 = -0.7222222228 Factor a perfect square on the left side: (x + 0.6666666665)(x + 0.6666666665) = -0.7222222228 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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