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Simplifying x2 = 4x + 40 Reorder the terms: x2 = 40 + 4x Solving x2 = 40 + 4x Solving for variable 'x'. Reorder the terms: -40 + -4x + x2 = 40 + 4x + -40 + -4x Reorder the terms: -40 + -4x + x2 = 40 + -40 + 4x + -4x Combine like terms: 40 + -40 = 0 -40 + -4x + x2 = 0 + 4x + -4x -40 + -4x + x2 = 4x + -4x Combine like terms: 4x + -4x = 0 -40 + -4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '40' to each side of the equation. -40 + -4x + 40 + x2 = 0 + 40 Reorder the terms: -40 + 40 + -4x + x2 = 0 + 40 Combine like terms: -40 + 40 = 0 0 + -4x + x2 = 0 + 40 -4x + x2 = 0 + 40 Combine like terms: 0 + 40 = 40 -4x + x2 = 40 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = 40 + 4 Reorder the terms: 4 + -4x + x2 = 40 + 4 Combine like terms: 40 + 4 = 44 4 + -4x + x2 = 44 Factor a perfect square on the left side: (x + -2)(x + -2) = 44 Calculate the square root of the right side: 6.633249581 Break this problem into two subproblems by setting (x + -2) equal to 6.633249581 and -6.633249581.Subproblem 1
x + -2 = 6.633249581 Simplifying x + -2 = 6.633249581 Reorder the terms: -2 + x = 6.633249581 Solving -2 + x = 6.633249581 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 6.633249581 + 2 Combine like terms: -2 + 2 = 0 0 + x = 6.633249581 + 2 x = 6.633249581 + 2 Combine like terms: 6.633249581 + 2 = 8.633249581 x = 8.633249581 Simplifying x = 8.633249581Subproblem 2
x + -2 = -6.633249581 Simplifying x + -2 = -6.633249581 Reorder the terms: -2 + x = -6.633249581 Solving -2 + x = -6.633249581 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -6.633249581 + 2 Combine like terms: -2 + 2 = 0 0 + x = -6.633249581 + 2 x = -6.633249581 + 2 Combine like terms: -6.633249581 + 2 = -4.633249581 x = -4.633249581 Simplifying x = -4.633249581Solution
The solution to the problem is based on the solutions from the subproblems. x = {8.633249581, -4.633249581}
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