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Simplifying (x + -1)(2x + 4) = 7 Reorder the terms: (-1 + x)(2x + 4) = 7 Reorder the terms: (-1 + x)(4 + 2x) = 7 Multiply (-1 + x) * (4 + 2x) (-1(4 + 2x) + x(4 + 2x)) = 7 ((4 * -1 + 2x * -1) + x(4 + 2x)) = 7 ((-4 + -2x) + x(4 + 2x)) = 7 (-4 + -2x + (4 * x + 2x * x)) = 7 (-4 + -2x + (4x + 2x2)) = 7 Combine like terms: -2x + 4x = 2x (-4 + 2x + 2x2) = 7 Solving -4 + 2x + 2x2 = 7 Solving for variable 'x'. Reorder the terms: -4 + -7 + 2x + 2x2 = 7 + -7 Combine like terms: -4 + -7 = -11 -11 + 2x + 2x2 = 7 + -7 Combine like terms: 7 + -7 = 0 -11 + 2x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -5.5 + x + x2 = 0 Move the constant term to the right: Add '5.5' to each side of the equation. -5.5 + x + 5.5 + x2 = 0 + 5.5 Reorder the terms: -5.5 + 5.5 + x + x2 = 0 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x + x2 = 0 + 5.5 x + x2 = 0 + 5.5 Combine like terms: 0 + 5.5 = 5.5 x + x2 = 5.5 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + x2 = 5.5 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + x2 = 5.5 + 0.25 Combine like terms: 5.5 + 0.25 = 5.75 1.25 + x2 = 5.75 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 5.75 Calculate the square root of the right side: 2.397915762 Break this problem into two subproblems by setting (x + 0.5) equal to 2.397915762 and -2.397915762.Subproblem 1
x + 0.5 = 2.397915762 Simplifying x + 0.5 = 2.397915762 Reorder the terms: 0.5 + x = 2.397915762 Solving 0.5 + x = 2.397915762 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 2.397915762 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 2.397915762 + -0.5 x = 2.397915762 + -0.5 Combine like terms: 2.397915762 + -0.5 = 1.897915762 x = 1.897915762 Simplifying x = 1.897915762Subproblem 2
x + 0.5 = -2.397915762 Simplifying x + 0.5 = -2.397915762 Reorder the terms: 0.5 + x = -2.397915762 Solving 0.5 + x = -2.397915762 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -2.397915762 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -2.397915762 + -0.5 x = -2.397915762 + -0.5 Combine like terms: -2.397915762 + -0.5 = -2.897915762 x = -2.897915762 Simplifying x = -2.897915762Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.897915762, -2.897915762}
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