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Simplifying x2 + -2x + -76 = 0 Reorder the terms: -76 + -2x + x2 = 0 Solving -76 + -2x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '76' to each side of the equation. -76 + -2x + 76 + x2 = 0 + 76 Reorder the terms: -76 + 76 + -2x + x2 = 0 + 76 Combine like terms: -76 + 76 = 0 0 + -2x + x2 = 0 + 76 -2x + x2 = 0 + 76 Combine like terms: 0 + 76 = 76 -2x + x2 = 76 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = 76 + 1 Reorder the terms: 1 + -2x + x2 = 76 + 1 Combine like terms: 76 + 1 = 77 1 + -2x + x2 = 77 Factor a perfect square on the left side: (x + -1)(x + -1) = 77 Calculate the square root of the right side: 8.774964387 Break this problem into two subproblems by setting (x + -1) equal to 8.774964387 and -8.774964387.Subproblem 1
x + -1 = 8.774964387 Simplifying x + -1 = 8.774964387 Reorder the terms: -1 + x = 8.774964387 Solving -1 + x = 8.774964387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 8.774964387 + 1 Combine like terms: -1 + 1 = 0 0 + x = 8.774964387 + 1 x = 8.774964387 + 1 Combine like terms: 8.774964387 + 1 = 9.774964387 x = 9.774964387 Simplifying x = 9.774964387Subproblem 2
x + -1 = -8.774964387 Simplifying x + -1 = -8.774964387 Reorder the terms: -1 + x = -8.774964387 Solving -1 + x = -8.774964387 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -8.774964387 + 1 Combine like terms: -1 + 1 = 0 0 + x = -8.774964387 + 1 x = -8.774964387 + 1 Combine like terms: -8.774964387 + 1 = -7.774964387 x = -7.774964387 Simplifying x = -7.774964387Solution
The solution to the problem is based on the solutions from the subproblems. x = {9.774964387, -7.774964387}
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