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Simplifying (4x + -3)(4x + -3) + 7 = 39 Reorder the terms: (-3 + 4x)(4x + -3) + 7 = 39 Reorder the terms: (-3 + 4x)(-3 + 4x) + 7 = 39 Multiply (-3 + 4x) * (-3 + 4x) (-3(-3 + 4x) + 4x * (-3 + 4x)) + 7 = 39 ((-3 * -3 + 4x * -3) + 4x * (-3 + 4x)) + 7 = 39 ((9 + -12x) + 4x * (-3 + 4x)) + 7 = 39 (9 + -12x + (-3 * 4x + 4x * 4x)) + 7 = 39 (9 + -12x + (-12x + 16x2)) + 7 = 39 Combine like terms: -12x + -12x = -24x (9 + -24x + 16x2) + 7 = 39 Reorder the terms: 9 + 7 + -24x + 16x2 = 39 Combine like terms: 9 + 7 = 16 16 + -24x + 16x2 = 39 Solving 16 + -24x + 16x2 = 39 Solving for variable 'x'. Reorder the terms: 16 + -39 + -24x + 16x2 = 39 + -39 Combine like terms: 16 + -39 = -23 -23 + -24x + 16x2 = 39 + -39 Combine like terms: 39 + -39 = 0 -23 + -24x + 16x2 = 0 Begin completing the square. Divide all terms by 16 the coefficient of the squared term: Divide each side by '16'. -1.4375 + -1.5x + x2 = 0 Move the constant term to the right: Add '1.4375' to each side of the equation. -1.4375 + -1.5x + 1.4375 + x2 = 0 + 1.4375 Reorder the terms: -1.4375 + 1.4375 + -1.5x + x2 = 0 + 1.4375 Combine like terms: -1.4375 + 1.4375 = 0.0000 0.0000 + -1.5x + x2 = 0 + 1.4375 -1.5x + x2 = 0 + 1.4375 Combine like terms: 0 + 1.4375 = 1.4375 -1.5x + x2 = 1.4375 The x term is -1.5x. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5x + 0.5625 + x2 = 1.4375 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = 1.4375 + 0.5625 Combine like terms: 1.4375 + 0.5625 = 2 0.5625 + -1.5x + x2 = 2 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = 2 Calculate the square root of the right side: 1.414213562 Break this problem into two subproblems by setting (x + -0.75) equal to 1.414213562 and -1.414213562.Subproblem 1
x + -0.75 = 1.414213562 Simplifying x + -0.75 = 1.414213562 Reorder the terms: -0.75 + x = 1.414213562 Solving -0.75 + x = 1.414213562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 1.414213562 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 1.414213562 + 0.75 x = 1.414213562 + 0.75 Combine like terms: 1.414213562 + 0.75 = 2.164213562 x = 2.164213562 Simplifying x = 2.164213562Subproblem 2
x + -0.75 = -1.414213562 Simplifying x + -0.75 = -1.414213562 Reorder the terms: -0.75 + x = -1.414213562 Solving -0.75 + x = -1.414213562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -1.414213562 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -1.414213562 + 0.75 x = -1.414213562 + 0.75 Combine like terms: -1.414213562 + 0.75 = -0.664213562 x = -0.664213562 Simplifying x = -0.664213562Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.164213562, -0.664213562}
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