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Simplifying x2 + (x + -4) = 55 Reorder the terms: x2 + (-4 + x) = 55 Remove parenthesis around (-4 + x) x2 + -4 + x = 55 Reorder the terms: -4 + x + x2 = 55 Solving -4 + x + x2 = 55 Solving for variable 'x'. Reorder the terms: -4 + -55 + x + x2 = 55 + -55 Combine like terms: -4 + -55 = -59 -59 + x + x2 = 55 + -55 Combine like terms: 55 + -55 = 0 -59 + x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '59' to each side of the equation. -59 + x + 59 + x2 = 0 + 59 Reorder the terms: -59 + 59 + x + x2 = 0 + 59 Combine like terms: -59 + 59 = 0 0 + x + x2 = 0 + 59 x + x2 = 0 + 59 Combine like terms: 0 + 59 = 59 x + x2 = 59 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 = 59 + 0.25 Reorder the terms: 0.25 + x + x2 = 59 + 0.25 Combine like terms: 59 + 0.25 = 59.25 0.25 + x + x2 = 59.25 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 59.25 Calculate the square root of the right side: 7.697402159 Break this problem into two subproblems by setting (x + 0.5) equal to 7.697402159 and -7.697402159.Subproblem 1
x + 0.5 = 7.697402159 Simplifying x + 0.5 = 7.697402159 Reorder the terms: 0.5 + x = 7.697402159 Solving 0.5 + x = 7.697402159 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 = 7.697402159 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 7.697402159 + -0.5 x = 7.697402159 + -0.5 Combine like terms: 7.697402159 + -0.5 = 7.197402159 x = 7.197402159 Simplifying x = 7.197402159Subproblem 2
x + 0.5 = -7.697402159 Simplifying x + 0.5 = -7.697402159 Reorder the terms: 0.5 + x = -7.697402159 Solving 0.5 + x = -7.697402159 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 = -7.697402159 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -7.697402159 + -0.5 x = -7.697402159 + -0.5 Combine like terms: -7.697402159 + -0.5 = -8.197402159 x = -8.197402159 Simplifying x = -8.197402159Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.197402159, -8.197402159}
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