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Simplifying (2x + 5)(x + -3) = 7 Reorder the terms: (5 + 2x)(x + -3) = 7 Reorder the terms: (5 + 2x)(-3 + x) = 7 Multiply (5 + 2x) * (-3 + x) (5(-3 + x) + 2x * (-3 + x)) = 7 ((-3 * 5 + x * 5) + 2x * (-3 + x)) = 7 ((-15 + 5x) + 2x * (-3 + x)) = 7 (-15 + 5x + (-3 * 2x + x * 2x)) = 7 (-15 + 5x + (-6x + 2x2)) = 7 Combine like terms: 5x + -6x = -1x (-15 + -1x + 2x2) = 7 Solving -15 + -1x + 2x2 = 7 Solving for variable 'x'. Reorder the terms: -15 + -7 + -1x + 2x2 = 7 + -7 Combine like terms: -15 + -7 = -22 -22 + -1x + 2x2 = 7 + -7 Combine like terms: 7 + -7 = 0 -22 + -1x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -11 + -0.5x + x2 = 0 Move the constant term to the right: Add '11' to each side of the equation. -11 + -0.5x + 11 + x2 = 0 + 11 Reorder the terms: -11 + 11 + -0.5x + x2 = 0 + 11 Combine like terms: -11 + 11 = 0 0 + -0.5x + x2 = 0 + 11 -0.5x + x2 = 0 + 11 Combine like terms: 0 + 11 = 11 -0.5x + x2 = 11 The x term is -0.5x. Take half its coefficient (-0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. -0.5x + 0.0625 + x2 = 11 + 0.0625 Reorder the terms: 0.0625 + -0.5x + x2 = 11 + 0.0625 Combine like terms: 11 + 0.0625 = 11.0625 0.0625 + -0.5x + x2 = 11.0625 Factor a perfect square on the left side: (x + -0.25)(x + -0.25) = 11.0625 Calculate the square root of the right side: 3.326033674 Break this problem into two subproblems by setting (x + -0.25) equal to 3.326033674 and -3.326033674.Subproblem 1
x + -0.25 = 3.326033674 Simplifying x + -0.25 = 3.326033674 Reorder the terms: -0.25 + x = 3.326033674 Solving -0.25 + x = 3.326033674 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 3.326033674 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 3.326033674 + 0.25 x = 3.326033674 + 0.25 Combine like terms: 3.326033674 + 0.25 = 3.576033674 x = 3.576033674 Simplifying x = 3.576033674Subproblem 2
x + -0.25 = -3.326033674 Simplifying x + -0.25 = -3.326033674 Reorder the terms: -0.25 + x = -3.326033674 Solving -0.25 + x = -3.326033674 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -3.326033674 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -3.326033674 + 0.25 x = -3.326033674 + 0.25 Combine like terms: -3.326033674 + 0.25 = -3.076033674 x = -3.076033674 Simplifying x = -3.076033674Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.576033674, -3.076033674}
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