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Simplifying b2 + -4b + -8 = 0 Reorder the terms: -8 + -4b + b2 = 0 Solving -8 + -4b + b2 = 0 Solving for variable 'b'. Begin completing the square. Move the constant term to the right: Add '8' to each side of the equation. -8 + -4b + 8 + b2 = 0 + 8 Reorder the terms: -8 + 8 + -4b + b2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -4b + b2 = 0 + 8 -4b + b2 = 0 + 8 Combine like terms: 0 + 8 = 8 -4b + b2 = 8 The b term is -4b. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4b + 4 + b2 = 8 + 4 Reorder the terms: 4 + -4b + b2 = 8 + 4 Combine like terms: 8 + 4 = 12 4 + -4b + b2 = 12 Factor a perfect square on the left side: (b + -2)(b + -2) = 12 Calculate the square root of the right side: 3.464101615 Break this problem into two subproblems by setting (b + -2) equal to 3.464101615 and -3.464101615.Subproblem 1
b + -2 = 3.464101615 Simplifying b + -2 = 3.464101615 Reorder the terms: -2 + b = 3.464101615 Solving -2 + b = 3.464101615 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + b = 3.464101615 + 2 Combine like terms: -2 + 2 = 0 0 + b = 3.464101615 + 2 b = 3.464101615 + 2 Combine like terms: 3.464101615 + 2 = 5.464101615 b = 5.464101615 Simplifying b = 5.464101615Subproblem 2
b + -2 = -3.464101615 Simplifying b + -2 = -3.464101615 Reorder the terms: -2 + b = -3.464101615 Solving -2 + b = -3.464101615 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + b = -3.464101615 + 2 Combine like terms: -2 + 2 = 0 0 + b = -3.464101615 + 2 b = -3.464101615 + 2 Combine like terms: -3.464101615 + 2 = -1.464101615 b = -1.464101615 Simplifying b = -1.464101615Solution
The solution to the problem is based on the solutions from the subproblems. b = {5.464101615, -1.464101615}
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