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Simplifying 6r2 + 3r + -5 = 0 Reorder the terms: -5 + 3r + 6r2 = 0 Solving -5 + 3r + 6r2 = 0 Solving for variable 'r'. Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -0.8333333333 + 0.5r + r2 = 0 Move the constant term to the right: Add '0.8333333333' to each side of the equation. -0.8333333333 + 0.5r + 0.8333333333 + r2 = 0 + 0.8333333333 Reorder the terms: -0.8333333333 + 0.8333333333 + 0.5r + r2 = 0 + 0.8333333333 Combine like terms: -0.8333333333 + 0.8333333333 = 0.0000000000 0.0000000000 + 0.5r + r2 = 0 + 0.8333333333 0.5r + r2 = 0 + 0.8333333333 Combine like terms: 0 + 0.8333333333 = 0.8333333333 0.5r + r2 = 0.8333333333 The r term is 0.5r. Take half its coefficient (0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. 0.5r + 0.0625 + r2 = 0.8333333333 + 0.0625 Reorder the terms: 0.0625 + 0.5r + r2 = 0.8333333333 + 0.0625 Combine like terms: 0.8333333333 + 0.0625 = 0.8958333333 0.0625 + 0.5r + r2 = 0.8958333333 Factor a perfect square on the left side: (r + 0.25)(r + 0.25) = 0.8958333333 Calculate the square root of the right side: 0.946484724 Break this problem into two subproblems by setting (r + 0.25) equal to 0.946484724 and -0.946484724.Subproblem 1
r + 0.25 = 0.946484724 Simplifying r + 0.25 = 0.946484724 Reorder the terms: 0.25 + r = 0.946484724 Solving 0.25 + r = 0.946484724 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + r = 0.946484724 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + r = 0.946484724 + -0.25 r = 0.946484724 + -0.25 Combine like terms: 0.946484724 + -0.25 = 0.696484724 r = 0.696484724 Simplifying r = 0.696484724Subproblem 2
r + 0.25 = -0.946484724 Simplifying r + 0.25 = -0.946484724 Reorder the terms: 0.25 + r = -0.946484724 Solving 0.25 + r = -0.946484724 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + r = -0.946484724 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + r = -0.946484724 + -0.25 r = -0.946484724 + -0.25 Combine like terms: -0.946484724 + -0.25 = -1.196484724 r = -1.196484724 Simplifying r = -1.196484724Solution
The solution to the problem is based on the solutions from the subproblems. r = {0.696484724, -1.196484724}
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