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Simplifying -2x2 + 16x + -90 = 0 Reorder the terms: -90 + 16x + -2x2 = 0 Solving -90 + 16x + -2x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '2'. 2(-45 + 8x + -1x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-45 + 8x + -1x2)' equal to zero and attempt to solve: Simplifying -45 + 8x + -1x2 = 0 Solving -45 + 8x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 45 + -8x + x2 = 0 Move the constant term to the right: Add '-45' to each side of the equation. 45 + -8x + -45 + x2 = 0 + -45 Reorder the terms: 45 + -45 + -8x + x2 = 0 + -45 Combine like terms: 45 + -45 = 0 0 + -8x + x2 = 0 + -45 -8x + x2 = 0 + -45 Combine like terms: 0 + -45 = -45 -8x + x2 = -45 The x term is -8x. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8x + 16 + x2 = -45 + 16 Reorder the terms: 16 + -8x + x2 = -45 + 16 Combine like terms: -45 + 16 = -29 16 + -8x + x2 = -29 Factor a perfect square on the left side: (x + -4)(x + -4) = -29 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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