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Simplifying 4x2 + -30x + -72 = 0 Reorder the terms: -72 + -30x + 4x2 = 0 Solving -72 + -30x + 4x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '2'. 2(-36 + -15x + 2x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-36 + -15x + 2x2)' equal to zero and attempt to solve: Simplifying -36 + -15x + 2x2 = 0 Solving -36 + -15x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -18 + -7.5x + x2 = 0 Move the constant term to the right: Add '18' to each side of the equation. -18 + -7.5x + 18 + x2 = 0 + 18 Reorder the terms: -18 + 18 + -7.5x + x2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + -7.5x + x2 = 0 + 18 -7.5x + x2 = 0 + 18 Combine like terms: 0 + 18 = 18 -7.5x + x2 = 18 The x term is -7.5x. Take half its coefficient (-3.75). Square it (14.0625) and add it to both sides. Add '14.0625' to each side of the equation. -7.5x + 14.0625 + x2 = 18 + 14.0625 Reorder the terms: 14.0625 + -7.5x + x2 = 18 + 14.0625 Combine like terms: 18 + 14.0625 = 32.0625 14.0625 + -7.5x + x2 = 32.0625 Factor a perfect square on the left side: (x + -3.75)(x + -3.75) = 32.0625 Calculate the square root of the right side: 5.662375826 Break this problem into two subproblems by setting (x + -3.75) equal to 5.662375826 and -5.662375826.Subproblem 1
x + -3.75 = 5.662375826 Simplifying x + -3.75 = 5.662375826 Reorder the terms: -3.75 + x = 5.662375826 Solving -3.75 + x = 5.662375826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = 5.662375826 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = 5.662375826 + 3.75 x = 5.662375826 + 3.75 Combine like terms: 5.662375826 + 3.75 = 9.412375826 x = 9.412375826 Simplifying x = 9.412375826Subproblem 2
x + -3.75 = -5.662375826 Simplifying x + -3.75 = -5.662375826 Reorder the terms: -3.75 + x = -5.662375826 Solving -3.75 + x = -5.662375826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = -5.662375826 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = -5.662375826 + 3.75 x = -5.662375826 + 3.75 Combine like terms: -5.662375826 + 3.75 = -1.912375826 x = -1.912375826 Simplifying x = -1.912375826Solution
The solution to the problem is based on the solutions from the subproblems. x = {9.412375826, -1.912375826}Solution
x = {9.412375826, -1.912375826}
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