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Simplifying x2 + -1.3x = -0.4 Reorder the terms: -1.3x + x2 = -0.4 Solving -1.3x + x2 = -0.4 Solving for variable 'x'. Reorder the terms: 0.4 + -1.3x + x2 = -0.4 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.4 + -1.3x + x2 = 0.0 Begin completing the square. Move the constant term to the right: Add '-0.4' to each side of the equation. 0.4 + -1.3x + -0.4 + x2 = 0.0 + -0.4 Reorder the terms: 0.4 + -0.4 + -1.3x + x2 = 0.0 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + -1.3x + x2 = 0.0 + -0.4 -1.3x + x2 = 0.0 + -0.4 Combine like terms: 0.0 + -0.4 = -0.4 -1.3x + x2 = -0.4 The x term is -1.3x. Take half its coefficient (-0.65). Square it (0.4225) and add it to both sides. Add '0.4225' to each side of the equation. -1.3x + 0.4225 + x2 = -0.4 + 0.4225 Reorder the terms: 0.4225 + -1.3x + x2 = -0.4 + 0.4225 Combine like terms: -0.4 + 0.4225 = 0.0225 0.4225 + -1.3x + x2 = 0.0225 Factor a perfect square on the left side: (x + -0.65)(x + -0.65) = 0.0225 Calculate the square root of the right side: 0.15 Break this problem into two subproblems by setting (x + -0.65) equal to 0.15 and -0.15.Subproblem 1
x + -0.65 = 0.15 Simplifying x + -0.65 = 0.15 Reorder the terms: -0.65 + x = 0.15 Solving -0.65 + x = 0.15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65' to each side of the equation. -0.65 + 0.65 + x = 0.15 + 0.65 Combine like terms: -0.65 + 0.65 = 0.00 0.00 + x = 0.15 + 0.65 x = 0.15 + 0.65 Combine like terms: 0.15 + 0.65 = 0.8 x = 0.8 Simplifying x = 0.8Subproblem 2
x + -0.65 = -0.15 Simplifying x + -0.65 = -0.15 Reorder the terms: -0.65 + x = -0.15 Solving -0.65 + x = -0.15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65' to each side of the equation. -0.65 + 0.65 + x = -0.15 + 0.65 Combine like terms: -0.65 + 0.65 = 0.00 0.00 + x = -0.15 + 0.65 x = -0.15 + 0.65 Combine like terms: -0.15 + 0.65 = 0.5 x = 0.5 Simplifying x = 0.5Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.8, 0.5}
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