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Simplifying (4x + 1)(x + -1) = 7 Reorder the terms: (1 + 4x)(x + -1) = 7 Reorder the terms: (1 + 4x)(-1 + x) = 7 Multiply (1 + 4x) * (-1 + x) (1(-1 + x) + 4x * (-1 + x)) = 7 ((-1 * 1 + x * 1) + 4x * (-1 + x)) = 7 ((-1 + 1x) + 4x * (-1 + x)) = 7 (-1 + 1x + (-1 * 4x + x * 4x)) = 7 (-1 + 1x + (-4x + 4x2)) = 7 Combine like terms: 1x + -4x = -3x (-1 + -3x + 4x2) = 7 Solving -1 + -3x + 4x2 = 7 Solving for variable 'x'. Reorder the terms: -1 + -7 + -3x + 4x2 = 7 + -7 Combine like terms: -1 + -7 = -8 -8 + -3x + 4x2 = 7 + -7 Combine like terms: 7 + -7 = 0 -8 + -3x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -2 + -0.75x + x2 = 0 Move the constant term to the right: Add '2' to each side of the equation. -2 + -0.75x + 2 + x2 = 0 + 2 Reorder the terms: -2 + 2 + -0.75x + x2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -0.75x + x2 = 0 + 2 -0.75x + x2 = 0 + 2 Combine like terms: 0 + 2 = 2 -0.75x + x2 = 2 The x term is -0.75x. Take half its coefficient (-0.375). Square it (0.140625) and add it to both sides. Add '0.140625' to each side of the equation. -0.75x + 0.140625 + x2 = 2 + 0.140625 Reorder the terms: 0.140625 + -0.75x + x2 = 2 + 0.140625 Combine like terms: 2 + 0.140625 = 2.140625 0.140625 + -0.75x + x2 = 2.140625 Factor a perfect square on the left side: (x + -0.375)(x + -0.375) = 2.140625 Calculate the square root of the right side: 1.463087489 Break this problem into two subproblems by setting (x + -0.375) equal to 1.463087489 and -1.463087489.Subproblem 1
x + -0.375 = 1.463087489 Simplifying x + -0.375 = 1.463087489 Reorder the terms: -0.375 + x = 1.463087489 Solving -0.375 + x = 1.463087489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = 1.463087489 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = 1.463087489 + 0.375 x = 1.463087489 + 0.375 Combine like terms: 1.463087489 + 0.375 = 1.838087489 x = 1.838087489 Simplifying x = 1.838087489Subproblem 2
x + -0.375 = -1.463087489 Simplifying x + -0.375 = -1.463087489 Reorder the terms: -0.375 + x = -1.463087489 Solving -0.375 + x = -1.463087489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = -1.463087489 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = -1.463087489 + 0.375 x = -1.463087489 + 0.375 Combine like terms: -1.463087489 + 0.375 = -1.088087489 x = -1.088087489 Simplifying x = -1.088087489Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.838087489, -1.088087489}
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