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Simplifying b2 + 4b + -1 = 0 Reorder the terms: -1 + 4b + b2 = 0 Solving -1 + 4b + b2 = 0 Solving for variable 'b'. Begin completing the square. Move the constant term to the right: Add '1' to each side of the equation. -1 + 4b + 1 + b2 = 0 + 1 Reorder the terms: -1 + 1 + 4b + b2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 4b + b2 = 0 + 1 4b + b2 = 0 + 1 Combine like terms: 0 + 1 = 1 4b + b2 = 1 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 = 1 + 4 Reorder the terms: 4 + 4b + b2 = 1 + 4 Combine like terms: 1 + 4 = 5 4 + 4b + b2 = 5 Factor a perfect square on the left side: (b + 2)(b + 2) = 5 Calculate the square root of the right side: 2.236067978 Break this problem into two subproblems by setting (b + 2) equal to 2.236067978 and -2.236067978.Subproblem 1
b + 2 = 2.236067978 Simplifying b + 2 = 2.236067978 Reorder the terms: 2 + b = 2.236067978 Solving 2 + b = 2.236067978 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 = 2.236067978 + -2 Combine like terms: 2 + -2 = 0 0 + b = 2.236067978 + -2 b = 2.236067978 + -2 Combine like terms: 2.236067978 + -2 = 0.236067978 b = 0.236067978 Simplifying b = 0.236067978Subproblem 2
b + 2 = -2.236067978 Simplifying b + 2 = -2.236067978 Reorder the terms: 2 + b = -2.236067978 Solving 2 + b = -2.236067978 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 = -2.236067978 + -2 Combine like terms: 2 + -2 = 0 0 + b = -2.236067978 + -2 b = -2.236067978 + -2 Combine like terms: -2.236067978 + -2 = -4.236067978 b = -4.236067978 Simplifying b = -4.236067978Solution
The solution to the problem is based on the solutions from the subproblems. b = {0.236067978, -4.236067978}
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