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Simplifying 5x(x + -2) + -1(x + 3) = 0 Reorder the terms: 5x(-2 + x) + -1(x + 3) = 0 (-2 * 5x + x * 5x) + -1(x + 3) = 0 (-10x + 5x2) + -1(x + 3) = 0 Reorder the terms: -10x + 5x2 + -1(3 + x) = 0 -10x + 5x2 + (3 * -1 + x * -1) = 0 -10x + 5x2 + (-3 + -1x) = 0 Reorder the terms: -3 + -10x + -1x + 5x2 = 0 Combine like terms: -10x + -1x = -11x -3 + -11x + 5x2 = 0 Solving -3 + -11x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -0.6 + -2.2x + x2 = 0 Move the constant term to the right: Add '0.6' to each side of the equation. -0.6 + -2.2x + 0.6 + x2 = 0 + 0.6 Reorder the terms: -0.6 + 0.6 + -2.2x + x2 = 0 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + -2.2x + x2 = 0 + 0.6 -2.2x + x2 = 0 + 0.6 Combine like terms: 0 + 0.6 = 0.6 -2.2x + x2 = 0.6 The x term is -2.2x. Take half its coefficient (-1.1). Square it (1.21) and add it to both sides. Add '1.21' to each side of the equation. -2.2x + 1.21 + x2 = 0.6 + 1.21 Reorder the terms: 1.21 + -2.2x + x2 = 0.6 + 1.21 Combine like terms: 0.6 + 1.21 = 1.81 1.21 + -2.2x + x2 = 1.81 Factor a perfect square on the left side: (x + -1.1)(x + -1.1) = 1.81 Calculate the square root of the right side: 1.345362405 Break this problem into two subproblems by setting (x + -1.1) equal to 1.345362405 and -1.345362405.Subproblem 1
x + -1.1 = 1.345362405 Simplifying x + -1.1 = 1.345362405 Reorder the terms: -1.1 + x = 1.345362405 Solving -1.1 + x = 1.345362405 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = 1.345362405 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = 1.345362405 + 1.1 x = 1.345362405 + 1.1 Combine like terms: 1.345362405 + 1.1 = 2.445362405 x = 2.445362405 Simplifying x = 2.445362405Subproblem 2
x + -1.1 = -1.345362405 Simplifying x + -1.1 = -1.345362405 Reorder the terms: -1.1 + x = -1.345362405 Solving -1.1 + x = -1.345362405 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = -1.345362405 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = -1.345362405 + 1.1 x = -1.345362405 + 1.1 Combine like terms: -1.345362405 + 1.1 = -0.245362405 x = -0.245362405 Simplifying x = -0.245362405Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.445362405, -0.245362405}
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