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Simplifying x2 + -1.6x + 0.6 = 0 Reorder the terms: 0.6 + -1.6x + x2 = 0 Solving 0.6 + -1.6x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-0.6' to each side of the equation. 0.6 + -1.6x + -0.6 + x2 = 0 + -0.6 Reorder the terms: 0.6 + -0.6 + -1.6x + x2 = 0 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + -1.6x + x2 = 0 + -0.6 -1.6x + x2 = 0 + -0.6 Combine like terms: 0 + -0.6 = -0.6 -1.6x + x2 = -0.6 The x term is -1.6x. Take half its coefficient (-0.8). Square it (0.64) and add it to both sides. Add '0.64' to each side of the equation. -1.6x + 0.64 + x2 = -0.6 + 0.64 Reorder the terms: 0.64 + -1.6x + x2 = -0.6 + 0.64 Combine like terms: -0.6 + 0.64 = 0.04 0.64 + -1.6x + x2 = 0.04 Factor a perfect square on the left side: (x + -0.8)(x + -0.8) = 0.04 Calculate the square root of the right side: 0.2 Break this problem into two subproblems by setting (x + -0.8) equal to 0.2 and -0.2.Subproblem 1
x + -0.8 = 0.2 Simplifying x + -0.8 = 0.2 Reorder the terms: -0.8 + x = 0.2 Solving -0.8 + x = 0.2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = 0.2 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = 0.2 + 0.8 x = 0.2 + 0.8 Combine like terms: 0.2 + 0.8 = 1 x = 1 Simplifying x = 1Subproblem 2
x + -0.8 = -0.2 Simplifying x + -0.8 = -0.2 Reorder the terms: -0.8 + x = -0.2 Solving -0.8 + x = -0.2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = -0.2 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = -0.2 + 0.8 x = -0.2 + 0.8 Combine like terms: -0.2 + 0.8 = 0.6 x = 0.6 Simplifying x = 0.6Solution
The solution to the problem is based on the solutions from the subproblems. x = {1, 0.6}
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