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Simplifying x2 + -12 + -15x = 0 Reorder the terms: -12 + -15x + x2 = 0 Solving -12 + -15x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '12' to each side of the equation. -12 + -15x + 12 + x2 = 0 + 12 Reorder the terms: -12 + 12 + -15x + x2 = 0 + 12 Combine like terms: -12 + 12 = 0 0 + -15x + x2 = 0 + 12 -15x + x2 = 0 + 12 Combine like terms: 0 + 12 = 12 -15x + x2 = 12 The x term is -15x. Take half its coefficient (-7.5). Square it (56.25) and add it to both sides. Add '56.25' to each side of the equation. -15x + 56.25 + x2 = 12 + 56.25 Reorder the terms: 56.25 + -15x + x2 = 12 + 56.25 Combine like terms: 12 + 56.25 = 68.25 56.25 + -15x + x2 = 68.25 Factor a perfect square on the left side: (x + -7.5)(x + -7.5) = 68.25 Calculate the square root of the right side: 8.261355821 Break this problem into two subproblems by setting (x + -7.5) equal to 8.261355821 and -8.261355821.Subproblem 1
x + -7.5 = 8.261355821 Simplifying x + -7.5 = 8.261355821 Reorder the terms: -7.5 + x = 8.261355821 Solving -7.5 + x = 8.261355821 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = 8.261355821 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 8.261355821 + 7.5 x = 8.261355821 + 7.5 Combine like terms: 8.261355821 + 7.5 = 15.761355821 x = 15.761355821 Simplifying x = 15.761355821Subproblem 2
x + -7.5 = -8.261355821 Simplifying x + -7.5 = -8.261355821 Reorder the terms: -7.5 + x = -8.261355821 Solving -7.5 + x = -8.261355821 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = -8.261355821 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -8.261355821 + 7.5 x = -8.261355821 + 7.5 Combine like terms: -8.261355821 + 7.5 = -0.761355821 x = -0.761355821 Simplifying x = -0.761355821Solution
The solution to the problem is based on the solutions from the subproblems. x = {15.761355821, -0.761355821}
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