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Simplifying x2 + 2x + -4 = 28 Reorder the terms: -4 + 2x + x2 = 28 Solving -4 + 2x + x2 = 28 Solving for variable 'x'. Reorder the terms: -4 + -28 + 2x + x2 = 28 + -28 Combine like terms: -4 + -28 = -32 -32 + 2x + x2 = 28 + -28 Combine like terms: 28 + -28 = 0 -32 + 2x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '32' to each side of the equation. -32 + 2x + 32 + x2 = 0 + 32 Reorder the terms: -32 + 32 + 2x + x2 = 0 + 32 Combine like terms: -32 + 32 = 0 0 + 2x + x2 = 0 + 32 2x + x2 = 0 + 32 Combine like terms: 0 + 32 = 32 2x + x2 = 32 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 = 32 + 1 Reorder the terms: 1 + 2x + x2 = 32 + 1 Combine like terms: 32 + 1 = 33 1 + 2x + x2 = 33 Factor a perfect square on the left side: (x + 1)(x + 1) = 33 Calculate the square root of the right side: 5.744562647 Break this problem into two subproblems by setting (x + 1) equal to 5.744562647 and -5.744562647.Subproblem 1
x + 1 = 5.744562647 Simplifying x + 1 = 5.744562647 Reorder the terms: 1 + x = 5.744562647 Solving 1 + x = 5.744562647 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 = 5.744562647 + -1 Combine like terms: 1 + -1 = 0 0 + x = 5.744562647 + -1 x = 5.744562647 + -1 Combine like terms: 5.744562647 + -1 = 4.744562647 x = 4.744562647 Simplifying x = 4.744562647Subproblem 2
x + 1 = -5.744562647 Simplifying x + 1 = -5.744562647 Reorder the terms: 1 + x = -5.744562647 Solving 1 + x = -5.744562647 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 = -5.744562647 + -1 Combine like terms: 1 + -1 = 0 0 + x = -5.744562647 + -1 x = -5.744562647 + -1 Combine like terms: -5.744562647 + -1 = -6.744562647 x = -6.744562647 Simplifying x = -6.744562647Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.744562647, -6.744562647}
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