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Simplifying 0.8 = 3.2x(1 + -1x) 0.8 = (1 * 3.2x + -1x * 3.2x) 0.8 = (3.2x + -3.2x2) Solving 0.8 = 3.2x + -3.2x2 Solving for variable 'x'. Reorder the terms: 0.8 + -3.2x + 3.2x2 = 3.2x + -3.2x + -3.2x2 + 3.2x2 Combine like terms: 3.2x + -3.2x = 0.0 0.8 + -3.2x + 3.2x2 = 0.0 + -3.2x2 + 3.2x2 0.8 + -3.2x + 3.2x2 = -3.2x2 + 3.2x2 Combine like terms: -3.2x2 + 3.2x2 = 0.0 0.8 + -3.2x + 3.2x2 = 0.0 Begin completing the square. Divide all terms by 3.2 the coefficient of the squared term: Divide each side by '3.2'. 0.25 + -1x + x2 = 0 Move the constant term to the right: Add '-0.25' to each side of the equation. 0.25 + -1x + -0.25 + x2 = 0 + -0.25 Reorder the terms: 0.25 + -0.25 + -1x + x2 = 0 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + -1x + x2 = 0 + -0.25 -1x + x2 = 0 + -0.25 Combine like terms: 0 + -0.25 = -0.25 -1x + x2 = -0.25 The x term is -1x. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1x + 0.25 + x2 = -0.25 + 0.25 Reorder the terms: 0.25 + -1x + x2 = -0.25 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.25 + -1x + x2 = 0.00 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = 0.00 Calculate the square root of the right side: 0.00 Break this problem into two subproblems by setting (x + -0.5) equal to 0.00 and 0.00.Subproblem 1
x + -0.5 = 0.00 Simplifying x + -0.5 = 0.00 Reorder the terms: -0.5 + x = 0.00 Solving -0.5 + x = 0.00 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 0.00 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.00 + 0.5 x = 0.00 + 0.5 Combine like terms: 0.00 + 0.5 = 0.5 x = 0.5 Simplifying x = 0.5Subproblem 2
x + -0.5 = 0.00 Simplifying x + -0.5 = 0.00 Reorder the terms: -0.5 + x = 0.00 Solving -0.5 + x = 0.00 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 0.00 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.00 + 0.5 x = 0.00 + 0.5 Combine like terms: 0.00 + 0.5 = 0.5 x = 0.5 Simplifying x = 0.5Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.5, 0.5}
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