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Simplifying -7 + 3b2 + -3b = 0 Reorder the terms: -7 + -3b + 3b2 = 0 Solving -7 + -3b + 3b2 = 0 Solving for variable 'b'. Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -2.333333333 + -1b + b2 = 0 Move the constant term to the right: Add '2.333333333' to each side of the equation. -2.333333333 + -1b + 2.333333333 + b2 = 0 + 2.333333333 Reorder the terms: -2.333333333 + 2.333333333 + -1b + b2 = 0 + 2.333333333 Combine like terms: -2.333333333 + 2.333333333 = 0.000000000 0.000000000 + -1b + b2 = 0 + 2.333333333 -1b + b2 = 0 + 2.333333333 Combine like terms: 0 + 2.333333333 = 2.333333333 -1b + b2 = 2.333333333 The b term is -1b. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1b + 0.25 + b2 = 2.333333333 + 0.25 Reorder the terms: 0.25 + -1b + b2 = 2.333333333 + 0.25 Combine like terms: 2.333333333 + 0.25 = 2.583333333 0.25 + -1b + b2 = 2.583333333 Factor a perfect square on the left side: (b + -0.5)(b + -0.5) = 2.583333333 Calculate the square root of the right side: 1.607275127 Break this problem into two subproblems by setting (b + -0.5) equal to 1.607275127 and -1.607275127.Subproblem 1
b + -0.5 = 1.607275127 Simplifying b + -0.5 = 1.607275127 Reorder the terms: -0.5 + b = 1.607275127 Solving -0.5 + b = 1.607275127 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + b = 1.607275127 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + b = 1.607275127 + 0.5 b = 1.607275127 + 0.5 Combine like terms: 1.607275127 + 0.5 = 2.107275127 b = 2.107275127 Simplifying b = 2.107275127Subproblem 2
b + -0.5 = -1.607275127 Simplifying b + -0.5 = -1.607275127 Reorder the terms: -0.5 + b = -1.607275127 Solving -0.5 + b = -1.607275127 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + b = -1.607275127 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + b = -1.607275127 + 0.5 b = -1.607275127 + 0.5 Combine like terms: -1.607275127 + 0.5 = -1.107275127 b = -1.107275127 Simplifying b = -1.107275127Solution
The solution to the problem is based on the solutions from the subproblems. b = {2.107275127, -1.107275127}
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