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Simplifying 2x2 + 2x + -30 = 0 Reorder the terms: -30 + 2x + 2x2 = 0 Solving -30 + 2x + 2x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '2'. 2(-15 + x + x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-15 + x + x2)' equal to zero and attempt to solve: Simplifying -15 + x + x2 = 0 Solving -15 + x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '15' to each side of the equation. -15 + x + 15 + x2 = 0 + 15 Reorder the terms: -15 + 15 + x + x2 = 0 + 15 Combine like terms: -15 + 15 = 0 0 + x + x2 = 0 + 15 x + x2 = 0 + 15 Combine like terms: 0 + 15 = 15 x + x2 = 15 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. x + 0.25 + x2 = 15 + 0.25 Reorder the terms: 0.25 + x + x2 = 15 + 0.25 Combine like terms: 15 + 0.25 = 15.25 0.25 + x + x2 = 15.25 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 15.25 Calculate the square root of the right side: 3.905124838 Break this problem into two subproblems by setting (x + 0.5) equal to 3.905124838 and -3.905124838.Subproblem 1
x + 0.5 = 3.905124838 Simplifying x + 0.5 = 3.905124838 Reorder the terms: 0.5 + x = 3.905124838 Solving 0.5 + x = 3.905124838 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 3.905124838 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 3.905124838 + -0.5 x = 3.905124838 + -0.5 Combine like terms: 3.905124838 + -0.5 = 3.405124838 x = 3.405124838 Simplifying x = 3.405124838Subproblem 2
x + 0.5 = -3.905124838 Simplifying x + 0.5 = -3.905124838 Reorder the terms: 0.5 + x = -3.905124838 Solving 0.5 + x = -3.905124838 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -3.905124838 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -3.905124838 + -0.5 x = -3.905124838 + -0.5 Combine like terms: -3.905124838 + -0.5 = -4.405124838 x = -4.405124838 Simplifying x = -4.405124838Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.405124838, -4.405124838}Solution
x = {3.405124838, -4.405124838}
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