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Simplifying 5x(x + -3) = 27 Reorder the terms: 5x(-3 + x) = 27 (-3 * 5x + x * 5x) = 27 (-15x + 5x2) = 27 Solving -15x + 5x2 = 27 Solving for variable 'x'. Reorder the terms: -27 + -15x + 5x2 = 27 + -27 Combine like terms: 27 + -27 = 0 -27 + -15x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -5.4 + -3x + x2 = 0 Move the constant term to the right: Add '5.4' to each side of the equation. -5.4 + -3x + 5.4 + x2 = 0 + 5.4 Reorder the terms: -5.4 + 5.4 + -3x + x2 = 0 + 5.4 Combine like terms: -5.4 + 5.4 = 0.0 0.0 + -3x + x2 = 0 + 5.4 -3x + x2 = 0 + 5.4 Combine like terms: 0 + 5.4 = 5.4 -3x + x2 = 5.4 The x term is -3x. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3x + 2.25 + x2 = 5.4 + 2.25 Reorder the terms: 2.25 + -3x + x2 = 5.4 + 2.25 Combine like terms: 5.4 + 2.25 = 7.65 2.25 + -3x + x2 = 7.65 Factor a perfect square on the left side: (x + -1.5)(x + -1.5) = 7.65 Calculate the square root of the right side: 2.765863337 Break this problem into two subproblems by setting (x + -1.5) equal to 2.765863337 and -2.765863337.Subproblem 1
x + -1.5 = 2.765863337 Simplifying x + -1.5 = 2.765863337 Reorder the terms: -1.5 + x = 2.765863337 Solving -1.5 + x = 2.765863337 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 2.765863337 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 2.765863337 + 1.5 x = 2.765863337 + 1.5 Combine like terms: 2.765863337 + 1.5 = 4.265863337 x = 4.265863337 Simplifying x = 4.265863337Subproblem 2
x + -1.5 = -2.765863337 Simplifying x + -1.5 = -2.765863337 Reorder the terms: -1.5 + x = -2.765863337 Solving -1.5 + x = -2.765863337 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -2.765863337 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -2.765863337 + 1.5 x = -2.765863337 + 1.5 Combine like terms: -2.765863337 + 1.5 = -1.265863337 x = -1.265863337 Simplifying x = -1.265863337Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.265863337, -1.265863337}
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