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Simplifying 8b + b2 = 56 Solving 8b + b2 = 56 Solving for variable 'b'. Reorder the terms: -56 + 8b + b2 = 56 + -56 Combine like terms: 56 + -56 = 0 -56 + 8b + b2 = 0 Begin completing the square. Move the constant term to the right: Add '56' to each side of the equation. -56 + 8b + 56 + b2 = 0 + 56 Reorder the terms: -56 + 56 + 8b + b2 = 0 + 56 Combine like terms: -56 + 56 = 0 0 + 8b + b2 = 0 + 56 8b + b2 = 0 + 56 Combine like terms: 0 + 56 = 56 8b + b2 = 56 The b term is 8b. Take half its coefficient (4). Square it (16) and add it to both sides. Add '16' to each side of the equation. 8b + 16 + b2 = 56 + 16 Reorder the terms: 16 + 8b + b2 = 56 + 16 Combine like terms: 56 + 16 = 72 16 + 8b + b2 = 72 Factor a perfect square on the left side: (b + 4)(b + 4) = 72 Calculate the square root of the right side: 8.485281374 Break this problem into two subproblems by setting (b + 4) equal to 8.485281374 and -8.485281374.Subproblem 1
b + 4 = 8.485281374 Simplifying b + 4 = 8.485281374 Reorder the terms: 4 + b = 8.485281374 Solving 4 + b = 8.485281374 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + b = 8.485281374 + -4 Combine like terms: 4 + -4 = 0 0 + b = 8.485281374 + -4 b = 8.485281374 + -4 Combine like terms: 8.485281374 + -4 = 4.485281374 b = 4.485281374 Simplifying b = 4.485281374Subproblem 2
b + 4 = -8.485281374 Simplifying b + 4 = -8.485281374 Reorder the terms: 4 + b = -8.485281374 Solving 4 + b = -8.485281374 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + b = -8.485281374 + -4 Combine like terms: 4 + -4 = 0 0 + b = -8.485281374 + -4 b = -8.485281374 + -4 Combine like terms: -8.485281374 + -4 = -12.485281374 b = -12.485281374 Simplifying b = -12.485281374Solution
The solution to the problem is based on the solutions from the subproblems. b = {4.485281374, -12.485281374}
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