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Simplifying (-5x2 + 30x + -55) = 0 Reorder the terms: (-55 + 30x + -5x2) = 0 Remove parenthesis around (-55 + 30x + -5x2) -55 + 30x + -5x2 = 0 Solving -55 + 30x + -5x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '5'. 5(-11 + 6x + -1x2) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(-11 + 6x + -1x2)' equal to zero and attempt to solve: Simplifying -11 + 6x + -1x2 = 0 Solving -11 + 6x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 11 + -6x + x2 = 0 Move the constant term to the right: Add '-11' to each side of the equation. 11 + -6x + -11 + x2 = 0 + -11 Reorder the terms: 11 + -11 + -6x + x2 = 0 + -11 Combine like terms: 11 + -11 = 0 0 + -6x + x2 = 0 + -11 -6x + x2 = 0 + -11 Combine like terms: 0 + -11 = -11 -6x + x2 = -11 The x term is -6x. Take half its coefficient (-3). Square it (9) and add it to both sides. Add '9' to each side of the equation. -6x + 9 + x2 = -11 + 9 Reorder the terms: 9 + -6x + x2 = -11 + 9 Combine like terms: -11 + 9 = -2 9 + -6x + x2 = -2 Factor a perfect square on the left side: (x + -3)(x + -3) = -2 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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