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Simplifying (2x + -1)(x + 4) = 4 Reorder the terms: (-1 + 2x)(x + 4) = 4 Reorder the terms: (-1 + 2x)(4 + x) = 4 Multiply (-1 + 2x) * (4 + x) (-1(4 + x) + 2x * (4 + x)) = 4 ((4 * -1 + x * -1) + 2x * (4 + x)) = 4 ((-4 + -1x) + 2x * (4 + x)) = 4 (-4 + -1x + (4 * 2x + x * 2x)) = 4 (-4 + -1x + (8x + 2x2)) = 4 Combine like terms: -1x + 8x = 7x (-4 + 7x + 2x2) = 4 Solving -4 + 7x + 2x2 = 4 Solving for variable 'x'. Reorder the terms: -4 + -4 + 7x + 2x2 = 4 + -4 Combine like terms: -4 + -4 = -8 -8 + 7x + 2x2 = 4 + -4 Combine like terms: 4 + -4 = 0 -8 + 7x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -4 + 3.5x + x2 = 0 Move the constant term to the right: Add '4' to each side of the equation. -4 + 3.5x + 4 + x2 = 0 + 4 Reorder the terms: -4 + 4 + 3.5x + x2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 3.5x + x2 = 0 + 4 3.5x + x2 = 0 + 4 Combine like terms: 0 + 4 = 4 3.5x + x2 = 4 The x term is 3.5x. Take half its coefficient (1.75). Square it (3.0625) and add it to both sides. Add '3.0625' to each side of the equation. 3.5x + 3.0625 + x2 = 4 + 3.0625 Reorder the terms: 3.0625 + 3.5x + x2 = 4 + 3.0625 Combine like terms: 4 + 3.0625 = 7.0625 3.0625 + 3.5x + x2 = 7.0625 Factor a perfect square on the left side: (x + 1.75)(x + 1.75) = 7.0625 Calculate the square root of the right side: 2.657536453 Break this problem into two subproblems by setting (x + 1.75) equal to 2.657536453 and -2.657536453.Subproblem 1
x + 1.75 = 2.657536453 Simplifying x + 1.75 = 2.657536453 Reorder the terms: 1.75 + x = 2.657536453 Solving 1.75 + x = 2.657536453 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = 2.657536453 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = 2.657536453 + -1.75 x = 2.657536453 + -1.75 Combine like terms: 2.657536453 + -1.75 = 0.907536453 x = 0.907536453 Simplifying x = 0.907536453Subproblem 2
x + 1.75 = -2.657536453 Simplifying x + 1.75 = -2.657536453 Reorder the terms: 1.75 + x = -2.657536453 Solving 1.75 + x = -2.657536453 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = -2.657536453 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = -2.657536453 + -1.75 x = -2.657536453 + -1.75 Combine like terms: -2.657536453 + -1.75 = -4.407536453 x = -4.407536453 Simplifying x = -4.407536453Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.907536453, -4.407536453}
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