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Simplifying r2 + -3r + 1 = 0 Reorder the terms: 1 + -3r + r2 = 0 Solving 1 + -3r + r2 = 0 Solving for variable 'r'. Begin completing the square. Move the constant term to the right: Add '-1' to each side of the equation. 1 + -3r + -1 + r2 = 0 + -1 Reorder the terms: 1 + -1 + -3r + r2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3r + r2 = 0 + -1 -3r + r2 = 0 + -1 Combine like terms: 0 + -1 = -1 -3r + r2 = -1 The r term is -3r. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3r + 2.25 + r2 = -1 + 2.25 Reorder the terms: 2.25 + -3r + r2 = -1 + 2.25 Combine like terms: -1 + 2.25 = 1.25 2.25 + -3r + r2 = 1.25 Factor a perfect square on the left side: (r + -1.5)(r + -1.5) = 1.25 Calculate the square root of the right side: 1.118033989 Break this problem into two subproblems by setting (r + -1.5) equal to 1.118033989 and -1.118033989.Subproblem 1
r + -1.5 = 1.118033989 Simplifying r + -1.5 = 1.118033989 Reorder the terms: -1.5 + r = 1.118033989 Solving -1.5 + r = 1.118033989 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + r = 1.118033989 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + r = 1.118033989 + 1.5 r = 1.118033989 + 1.5 Combine like terms: 1.118033989 + 1.5 = 2.618033989 r = 2.618033989 Simplifying r = 2.618033989Subproblem 2
r + -1.5 = -1.118033989 Simplifying r + -1.5 = -1.118033989 Reorder the terms: -1.5 + r = -1.118033989 Solving -1.5 + r = -1.118033989 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + r = -1.118033989 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + r = -1.118033989 + 1.5 r = -1.118033989 + 1.5 Combine like terms: -1.118033989 + 1.5 = 0.381966011 r = 0.381966011 Simplifying r = 0.381966011Solution
The solution to the problem is based on the solutions from the subproblems. r = {2.618033989, 0.381966011}
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