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Simplifying 0 = 240x3 + 900x2 + -720x Reorder the terms: 0 = -720x + 900x2 + 240x3 Solving 0 = -720x + 900x2 + 240x3 Solving for variable 'x'. Remove the zero: 720x + -900x2 + -240x3 = -720x + 900x2 + 240x3 + 720x + -900x2 + -240x3 Reorder the terms: 720x + -900x2 + -240x3 = -720x + 720x + 900x2 + -900x2 + 240x3 + -240x3 Combine like terms: -720x + 720x = 0 720x + -900x2 + -240x3 = 0 + 900x2 + -900x2 + 240x3 + -240x3 720x + -900x2 + -240x3 = 900x2 + -900x2 + 240x3 + -240x3 Combine like terms: 900x2 + -900x2 = 0 720x + -900x2 + -240x3 = 0 + 240x3 + -240x3 720x + -900x2 + -240x3 = 240x3 + -240x3 Combine like terms: 240x3 + -240x3 = 0 720x + -900x2 + -240x3 = 0 Factor out the Greatest Common Factor (GCF), '60x'. 60x(12 + -15x + -4x2) = 0 Ignore the factor 60.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 '(12 + -15x + -4x2)' equal to zero and attempt to solve: Simplifying 12 + -15x + -4x2 = 0 Solving 12 + -15x + -4x2 = 0 Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -3 + 3.75x + x2 = 0 Move the constant term to the right: Add '3' to each side of the equation. -3 + 3.75x + 3 + x2 = 0 + 3 Reorder the terms: -3 + 3 + 3.75x + x2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + 3.75x + x2 = 0 + 3 3.75x + x2 = 0 + 3 Combine like terms: 0 + 3 = 3 3.75x + x2 = 3 The x term is 3.75x. Take half its coefficient (1.875). Square it (3.515625) and add it to both sides. Add '3.515625' to each side of the equation. 3.75x + 3.515625 + x2 = 3 + 3.515625 Reorder the terms: 3.515625 + 3.75x + x2 = 3 + 3.515625 Combine like terms: 3 + 3.515625 = 6.515625 3.515625 + 3.75x + x2 = 6.515625 Factor a perfect square on the left side: (x + 1.875)(x + 1.875) = 6.515625 Calculate the square root of the right side: 2.552572232 Break this problem into two subproblems by setting (x + 1.875) equal to 2.552572232 and -2.552572232.Subproblem 1
x + 1.875 = 2.552572232 Simplifying x + 1.875 = 2.552572232 Reorder the terms: 1.875 + x = 2.552572232 Solving 1.875 + x = 2.552572232 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = 2.552572232 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = 2.552572232 + -1.875 x = 2.552572232 + -1.875 Combine like terms: 2.552572232 + -1.875 = 0.677572232 x = 0.677572232 Simplifying x = 0.677572232Subproblem 2
x + 1.875 = -2.552572232 Simplifying x + 1.875 = -2.552572232 Reorder the terms: 1.875 + x = -2.552572232 Solving 1.875 + x = -2.552572232 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = -2.552572232 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = -2.552572232 + -1.875 x = -2.552572232 + -1.875 Combine like terms: -2.552572232 + -1.875 = -4.427572232 x = -4.427572232 Simplifying x = -4.427572232Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.677572232, -4.427572232}Solution
x = {0, 0.677572232, -4.427572232}
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