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Simplifying 2b2 + 5b = 2 Reorder the terms: 5b + 2b2 = 2 Solving 5b + 2b2 = 2 Solving for variable 'b'. Reorder the terms: -2 + 5b + 2b2 = 2 + -2 Combine like terms: 2 + -2 = 0 -2 + 5b + 2b2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -1 + 2.5b + b2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + 2.5b + 1 + b2 = 0 + 1 Reorder the terms: -1 + 1 + 2.5b + b2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 2.5b + b2 = 0 + 1 2.5b + b2 = 0 + 1 Combine like terms: 0 + 1 = 1 2.5b + b2 = 1 The b term is 2.5b. Take half its coefficient (1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. 2.5b + 1.5625 + b2 = 1 + 1.5625 Reorder the terms: 1.5625 + 2.5b + b2 = 1 + 1.5625 Combine like terms: 1 + 1.5625 = 2.5625 1.5625 + 2.5b + b2 = 2.5625 Factor a perfect square on the left side: (b + 1.25)(b + 1.25) = 2.5625 Calculate the square root of the right side: 1.600781059 Break this problem into two subproblems by setting (b + 1.25) equal to 1.600781059 and -1.600781059.Subproblem 1
b + 1.25 = 1.600781059 Simplifying b + 1.25 = 1.600781059 Reorder the terms: 1.25 + b = 1.600781059 Solving 1.25 + b = 1.600781059 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + b = 1.600781059 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + b = 1.600781059 + -1.25 b = 1.600781059 + -1.25 Combine like terms: 1.600781059 + -1.25 = 0.350781059 b = 0.350781059 Simplifying b = 0.350781059Subproblem 2
b + 1.25 = -1.600781059 Simplifying b + 1.25 = -1.600781059 Reorder the terms: 1.25 + b = -1.600781059 Solving 1.25 + b = -1.600781059 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + b = -1.600781059 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + b = -1.600781059 + -1.25 b = -1.600781059 + -1.25 Combine like terms: -1.600781059 + -1.25 = -2.850781059 b = -2.850781059 Simplifying b = -2.850781059Solution
The solution to the problem is based on the solutions from the subproblems. b = {0.350781059, -2.850781059}
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