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Simplifying x2 + 4x + -216 = 0 Reorder the terms: -216 + 4x + x2 = 0 Solving -216 + 4x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '216' to each side of the equation. -216 + 4x + 216 + x2 = 0 + 216 Reorder the terms: -216 + 216 + 4x + x2 = 0 + 216 Combine like terms: -216 + 216 = 0 0 + 4x + x2 = 0 + 216 4x + x2 = 0 + 216 Combine like terms: 0 + 216 = 216 4x + x2 = 216 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 = 216 + 4 Reorder the terms: 4 + 4x + x2 = 216 + 4 Combine like terms: 216 + 4 = 220 4 + 4x + x2 = 220 Factor a perfect square on the left side: (x + 2)(x + 2) = 220 Calculate the square root of the right side: 14.832396974 Break this problem into two subproblems by setting (x + 2) equal to 14.832396974 and -14.832396974.Subproblem 1
x + 2 = 14.832396974 Simplifying x + 2 = 14.832396974 Reorder the terms: 2 + x = 14.832396974 Solving 2 + x = 14.832396974 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 = 14.832396974 + -2 Combine like terms: 2 + -2 = 0 0 + x = 14.832396974 + -2 x = 14.832396974 + -2 Combine like terms: 14.832396974 + -2 = 12.832396974 x = 12.832396974 Simplifying x = 12.832396974Subproblem 2
x + 2 = -14.832396974 Simplifying x + 2 = -14.832396974 Reorder the terms: 2 + x = -14.832396974 Solving 2 + x = -14.832396974 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 = -14.832396974 + -2 Combine like terms: 2 + -2 = 0 0 + x = -14.832396974 + -2 x = -14.832396974 + -2 Combine like terms: -14.832396974 + -2 = -16.832396974 x = -16.832396974 Simplifying x = -16.832396974Solution
The solution to the problem is based on the solutions from the subproblems. x = {12.832396974, -16.832396974}
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