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Simplifying -0.6x2 + -1.2x + 4 = 0 Reorder the terms: 4 + -1.2x + -0.6x2 = 0 Solving 4 + -1.2x + -0.6x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -0.6 the coefficient of the squared term: Divide each side by '-0.6'. -6.666666667 + 2x + x2 = 0 Move the constant term to the right: Add '6.666666667' to each side of the equation. -6.666666667 + 2x + 6.666666667 + x2 = 0 + 6.666666667 Reorder the terms: -6.666666667 + 6.666666667 + 2x + x2 = 0 + 6.666666667 Combine like terms: -6.666666667 + 6.666666667 = 0.000000000 0.000000000 + 2x + x2 = 0 + 6.666666667 2x + x2 = 0 + 6.666666667 Combine like terms: 0 + 6.666666667 = 6.666666667 2x + x2 = 6.666666667 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 = 6.666666667 + 1 Reorder the terms: 1 + 2x + x2 = 6.666666667 + 1 Combine like terms: 6.666666667 + 1 = 7.666666667 1 + 2x + x2 = 7.666666667 Factor a perfect square on the left side: (x + 1)(x + 1) = 7.666666667 Calculate the square root of the right side: 2.768874621 Break this problem into two subproblems by setting (x + 1) equal to 2.768874621 and -2.768874621.Subproblem 1
x + 1 = 2.768874621 Simplifying x + 1 = 2.768874621 Reorder the terms: 1 + x = 2.768874621 Solving 1 + x = 2.768874621 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 = 2.768874621 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.768874621 + -1 x = 2.768874621 + -1 Combine like terms: 2.768874621 + -1 = 1.768874621 x = 1.768874621 Simplifying x = 1.768874621Subproblem 2
x + 1 = -2.768874621 Simplifying x + 1 = -2.768874621 Reorder the terms: 1 + x = -2.768874621 Solving 1 + x = -2.768874621 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 = -2.768874621 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.768874621 + -1 x = -2.768874621 + -1 Combine like terms: -2.768874621 + -1 = -3.768874621 x = -3.768874621 Simplifying x = -3.768874621Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.768874621, -3.768874621}
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