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Simplifying x2 + -2x + 0.91 = 0 Reorder the terms: 0.91 + -2x + x2 = 0 Solving 0.91 + -2x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-0.91' to each side of the equation. 0.91 + -2x + -0.91 + x2 = 0 + -0.91 Reorder the terms: 0.91 + -0.91 + -2x + x2 = 0 + -0.91 Combine like terms: 0.91 + -0.91 = 0.00 0.00 + -2x + x2 = 0 + -0.91 -2x + x2 = 0 + -0.91 Combine like terms: 0 + -0.91 = -0.91 -2x + x2 = -0.91 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = -0.91 + 1 Reorder the terms: 1 + -2x + x2 = -0.91 + 1 Combine like terms: -0.91 + 1 = 0.09 1 + -2x + x2 = 0.09 Factor a perfect square on the left side: (x + -1)(x + -1) = 0.09 Calculate the square root of the right side: 0.3 Break this problem into two subproblems by setting (x + -1) equal to 0.3 and -0.3.Subproblem 1
x + -1 = 0.3 Simplifying x + -1 = 0.3 Reorder the terms: -1 + x = 0.3 Solving -1 + x = 0.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 0.3 + 1 Combine like terms: -1 + 1 = 0 0 + x = 0.3 + 1 x = 0.3 + 1 Combine like terms: 0.3 + 1 = 1.3 x = 1.3 Simplifying x = 1.3Subproblem 2
x + -1 = -0.3 Simplifying x + -1 = -0.3 Reorder the terms: -1 + x = -0.3 Solving -1 + x = -0.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -0.3 + 1 Combine like terms: -1 + 1 = 0 0 + x = -0.3 + 1 x = -0.3 + 1 Combine like terms: -0.3 + 1 = 0.7 x = 0.7 Simplifying x = 0.7Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.3, 0.7}
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