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Simplifying 25x2 + 16x + -13 = 0 Reorder the terms: -13 + 16x + 25x2 = 0 Solving -13 + 16x + 25x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 25 the coefficient of the squared term: Divide each side by '25'. -0.52 + 0.64x + x2 = 0 Move the constant term to the right: Add '0.52' to each side of the equation. -0.52 + 0.64x + 0.52 + x2 = 0 + 0.52 Reorder the terms: -0.52 + 0.52 + 0.64x + x2 = 0 + 0.52 Combine like terms: -0.52 + 0.52 = 0.00 0.00 + 0.64x + x2 = 0 + 0.52 0.64x + x2 = 0 + 0.52 Combine like terms: 0 + 0.52 = 0.52 0.64x + x2 = 0.52 The x term is 0.64x. Take half its coefficient (0.32). Square it (0.1024) and add it to both sides. Add '0.1024' to each side of the equation. 0.64x + 0.1024 + x2 = 0.52 + 0.1024 Reorder the terms: 0.1024 + 0.64x + x2 = 0.52 + 0.1024 Combine like terms: 0.52 + 0.1024 = 0.6224 0.1024 + 0.64x + x2 = 0.6224 Factor a perfect square on the left side: (x + 0.32)(x + 0.32) = 0.6224 Calculate the square root of the right side: 0.788923317 Break this problem into two subproblems by setting (x + 0.32) equal to 0.788923317 and -0.788923317.Subproblem 1
x + 0.32 = 0.788923317 Simplifying x + 0.32 = 0.788923317 Reorder the terms: 0.32 + x = 0.788923317 Solving 0.32 + x = 0.788923317 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.32' to each side of the equation. 0.32 + -0.32 + x = 0.788923317 + -0.32 Combine like terms: 0.32 + -0.32 = 0.00 0.00 + x = 0.788923317 + -0.32 x = 0.788923317 + -0.32 Combine like terms: 0.788923317 + -0.32 = 0.468923317 x = 0.468923317 Simplifying x = 0.468923317Subproblem 2
x + 0.32 = -0.788923317 Simplifying x + 0.32 = -0.788923317 Reorder the terms: 0.32 + x = -0.788923317 Solving 0.32 + x = -0.788923317 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.32' to each side of the equation. 0.32 + -0.32 + x = -0.788923317 + -0.32 Combine like terms: 0.32 + -0.32 = 0.00 0.00 + x = -0.788923317 + -0.32 x = -0.788923317 + -0.32 Combine like terms: -0.788923317 + -0.32 = -1.108923317 x = -1.108923317 Simplifying x = -1.108923317Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.468923317, -1.108923317}
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