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Simplifying 0 = x2 + 2x + -0.44 Reorder the terms: 0 = -0.44 + 2x + x2 Solving 0 = -0.44 + 2x + x2 Solving for variable 'x'. Combine like terms: 0 + 0.44 = 0.44 0.44 + -2x + -1x2 = -0.44 + 2x + x2 + 0.44 + -2x + -1x2 Reorder the terms: 0.44 + -2x + -1x2 = -0.44 + 0.44 + 2x + -2x + x2 + -1x2 Combine like terms: -0.44 + 0.44 = 0.00 0.44 + -2x + -1x2 = 0.00 + 2x + -2x + x2 + -1x2 0.44 + -2x + -1x2 = 2x + -2x + x2 + -1x2 Combine like terms: 2x + -2x = 0 0.44 + -2x + -1x2 = 0 + x2 + -1x2 0.44 + -2x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 0.44 + -2x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -0.44 + 2x + x2 = 0 Move the constant term to the right: Add '0.44' to each side of the equation. -0.44 + 2x + 0.44 + x2 = 0 + 0.44 Reorder the terms: -0.44 + 0.44 + 2x + x2 = 0 + 0.44 Combine like terms: -0.44 + 0.44 = 0.00 0.00 + 2x + x2 = 0 + 0.44 2x + x2 = 0 + 0.44 Combine like terms: 0 + 0.44 = 0.44 2x + x2 = 0.44 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 = 0.44 + 1 Reorder the terms: 1 + 2x + x2 = 0.44 + 1 Combine like terms: 0.44 + 1 = 1.44 1 + 2x + x2 = 1.44 Factor a perfect square on the left side: (x + 1)(x + 1) = 1.44 Calculate the square root of the right side: 1.2 Break this problem into two subproblems by setting (x + 1) equal to 1.2 and -1.2.Subproblem 1
x + 1 = 1.2 Simplifying x + 1 = 1.2 Reorder the terms: 1 + x = 1.2 Solving 1 + x = 1.2 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 = 1.2 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.2 + -1 x = 1.2 + -1 Combine like terms: 1.2 + -1 = 0.2 x = 0.2 Simplifying x = 0.2Subproblem 2
x + 1 = -1.2 Simplifying x + 1 = -1.2 Reorder the terms: 1 + x = -1.2 Solving 1 + x = -1.2 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 = -1.2 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.2 + -1 x = -1.2 + -1 Combine like terms: -1.2 + -1 = -2.2 x = -2.2 Simplifying x = -2.2Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.2, -2.2}
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