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Simplifying w2 + 4w + -72 = 0 Reorder the terms: -72 + 4w + w2 = 0 Solving -72 + 4w + w2 = 0 Solving for variable 'w'. Begin completing the square. Move the constant term to the right: Add '72' to each side of the equation. -72 + 4w + 72 + w2 = 0 + 72 Reorder the terms: -72 + 72 + 4w + w2 = 0 + 72 Combine like terms: -72 + 72 = 0 0 + 4w + w2 = 0 + 72 4w + w2 = 0 + 72 Combine like terms: 0 + 72 = 72 4w + w2 = 72 The w term is 4w. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4w + 4 + w2 = 72 + 4 Reorder the terms: 4 + 4w + w2 = 72 + 4 Combine like terms: 72 + 4 = 76 4 + 4w + w2 = 76 Factor a perfect square on the left side: (w + 2)(w + 2) = 76 Calculate the square root of the right side: 8.717797887 Break this problem into two subproblems by setting (w + 2) equal to 8.717797887 and -8.717797887.Subproblem 1
w + 2 = 8.717797887 Simplifying w + 2 = 8.717797887 Reorder the terms: 2 + w = 8.717797887 Solving 2 + w = 8.717797887 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + w = 8.717797887 + -2 Combine like terms: 2 + -2 = 0 0 + w = 8.717797887 + -2 w = 8.717797887 + -2 Combine like terms: 8.717797887 + -2 = 6.717797887 w = 6.717797887 Simplifying w = 6.717797887Subproblem 2
w + 2 = -8.717797887 Simplifying w + 2 = -8.717797887 Reorder the terms: 2 + w = -8.717797887 Solving 2 + w = -8.717797887 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + w = -8.717797887 + -2 Combine like terms: 2 + -2 = 0 0 + w = -8.717797887 + -2 w = -8.717797887 + -2 Combine like terms: -8.717797887 + -2 = -10.717797887 w = -10.717797887 Simplifying w = -10.717797887Solution
The solution to the problem is based on the solutions from the subproblems. w = {6.717797887, -10.717797887}
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