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Simplifying -8x3 + 18x2 + 4x = 0 Reorder the terms: 4x + 18x2 + -8x3 = 0 Solving 4x + 18x2 + -8x3 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '2x'. 2x(2 + 9x + -4x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0Subproblem 2
Set the factor '(2 + 9x + -4x2)' equal to zero and attempt to solve: Simplifying 2 + 9x + -4x2 = 0 Solving 2 + 9x + -4x2 = 0 Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -0.5 + -2.25x + x2 = 0 Move the constant term to the right: Add '0.5' to each side of the equation. -0.5 + -2.25x + 0.5 + x2 = 0 + 0.5 Reorder the terms: -0.5 + 0.5 + -2.25x + x2 = 0 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + -2.25x + x2 = 0 + 0.5 -2.25x + x2 = 0 + 0.5 Combine like terms: 0 + 0.5 = 0.5 -2.25x + x2 = 0.5 The x term is -2.25x. Take half its coefficient (-1.125). Square it (1.265625) and add it to both sides. Add '1.265625' to each side of the equation. -2.25x + 1.265625 + x2 = 0.5 + 1.265625 Reorder the terms: 1.265625 + -2.25x + x2 = 0.5 + 1.265625 Combine like terms: 0.5 + 1.265625 = 1.765625 1.265625 + -2.25x + x2 = 1.765625 Factor a perfect square on the left side: (x + -1.125)(x + -1.125) = 1.765625 Calculate the square root of the right side: 1.328768227 Break this problem into two subproblems by setting (x + -1.125) equal to 1.328768227 and -1.328768227.Subproblem 1
x + -1.125 = 1.328768227 Simplifying x + -1.125 = 1.328768227 Reorder the terms: -1.125 + x = 1.328768227 Solving -1.125 + x = 1.328768227 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = 1.328768227 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = 1.328768227 + 1.125 x = 1.328768227 + 1.125 Combine like terms: 1.328768227 + 1.125 = 2.453768227 x = 2.453768227 Simplifying x = 2.453768227Subproblem 2
x + -1.125 = -1.328768227 Simplifying x + -1.125 = -1.328768227 Reorder the terms: -1.125 + x = -1.328768227 Solving -1.125 + x = -1.328768227 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + x = -1.328768227 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + x = -1.328768227 + 1.125 x = -1.328768227 + 1.125 Combine like terms: -1.328768227 + 1.125 = -0.203768227 x = -0.203768227 Simplifying x = -0.203768227Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.453768227, -0.203768227}Solution
x = {0, 2.453768227, -0.203768227}
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