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Simplifying (x + 4)(x + 8) + -1(5x + 3)(x + 3) = 0 Reorder the terms: (4 + x)(x + 8) + -1(5x + 3)(x + 3) = 0 Reorder the terms: (4 + x)(8 + x) + -1(5x + 3)(x + 3) = 0 Multiply (4 + x) * (8 + x) (4(8 + x) + x(8 + x)) + -1(5x + 3)(x + 3) = 0 ((8 * 4 + x * 4) + x(8 + x)) + -1(5x + 3)(x + 3) = 0 ((32 + 4x) + x(8 + x)) + -1(5x + 3)(x + 3) = 0 (32 + 4x + (8 * x + x * x)) + -1(5x + 3)(x + 3) = 0 (32 + 4x + (8x + x2)) + -1(5x + 3)(x + 3) = 0 Combine like terms: 4x + 8x = 12x (32 + 12x + x2) + -1(5x + 3)(x + 3) = 0 Reorder the terms: 32 + 12x + x2 + -1(3 + 5x)(x + 3) = 0 Reorder the terms: 32 + 12x + x2 + -1(3 + 5x)(3 + x) = 0 Multiply (3 + 5x) * (3 + x) 32 + 12x + x2 + -1(3(3 + x) + 5x * (3 + x)) = 0 32 + 12x + x2 + -1((3 * 3 + x * 3) + 5x * (3 + x)) = 0 32 + 12x + x2 + -1((9 + 3x) + 5x * (3 + x)) = 0 32 + 12x + x2 + -1(9 + 3x + (3 * 5x + x * 5x)) = 0 32 + 12x + x2 + -1(9 + 3x + (15x + 5x2)) = 0 Combine like terms: 3x + 15x = 18x 32 + 12x + x2 + -1(9 + 18x + 5x2) = 0 32 + 12x + x2 + (9 * -1 + 18x * -1 + 5x2 * -1) = 0 32 + 12x + x2 + (-9 + -18x + -5x2) = 0 Reorder the terms: 32 + -9 + 12x + -18x + x2 + -5x2 = 0 Combine like terms: 32 + -9 = 23 23 + 12x + -18x + x2 + -5x2 = 0 Combine like terms: 12x + -18x = -6x 23 + -6x + x2 + -5x2 = 0 Combine like terms: x2 + -5x2 = -4x2 23 + -6x + -4x2 = 0 Solving 23 + -6x + -4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -5.75 + 1.5x + x2 = 0 Move the constant term to the right: Add '5.75' to each side of the equation. -5.75 + 1.5x + 5.75 + x2 = 0 + 5.75 Reorder the terms: -5.75 + 5.75 + 1.5x + x2 = 0 + 5.75 Combine like terms: -5.75 + 5.75 = 0.00 0.00 + 1.5x + x2 = 0 + 5.75 1.5x + x2 = 0 + 5.75 Combine like terms: 0 + 5.75 = 5.75 1.5x + x2 = 5.75 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 = 5.75 + 0.5625 Reorder the terms: 0.5625 + 1.5x + x2 = 5.75 + 0.5625 Combine like terms: 5.75 + 0.5625 = 6.3125 0.5625 + 1.5x + x2 = 6.3125 Factor a perfect square on the left side: (x + 0.75)(x + 0.75) = 6.3125 Calculate the square root of the right side: 2.512468905 Break this problem into two subproblems by setting (x + 0.75) equal to 2.512468905 and -2.512468905.Subproblem 1
x + 0.75 = 2.512468905 Simplifying x + 0.75 = 2.512468905 Reorder the terms: 0.75 + x = 2.512468905 Solving 0.75 + x = 2.512468905 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 = 2.512468905 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 2.512468905 + -0.75 x = 2.512468905 + -0.75 Combine like terms: 2.512468905 + -0.75 = 1.762468905 x = 1.762468905 Simplifying x = 1.762468905Subproblem 2
x + 0.75 = -2.512468905 Simplifying x + 0.75 = -2.512468905 Reorder the terms: 0.75 + x = -2.512468905 Solving 0.75 + x = -2.512468905 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 = -2.512468905 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -2.512468905 + -0.75 x = -2.512468905 + -0.75 Combine like terms: -2.512468905 + -0.75 = -3.262468905 x = -3.262468905 Simplifying x = -3.262468905Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.762468905, -3.262468905}
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