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Simplifying (3x + 1)(x + -4) + -1(x + -7) = 0 Reorder the terms: (1 + 3x)(x + -4) + -1(x + -7) = 0 Reorder the terms: (1 + 3x)(-4 + x) + -1(x + -7) = 0 Multiply (1 + 3x) * (-4 + x) (1(-4 + x) + 3x * (-4 + x)) + -1(x + -7) = 0 ((-4 * 1 + x * 1) + 3x * (-4 + x)) + -1(x + -7) = 0 ((-4 + 1x) + 3x * (-4 + x)) + -1(x + -7) = 0 (-4 + 1x + (-4 * 3x + x * 3x)) + -1(x + -7) = 0 (-4 + 1x + (-12x + 3x2)) + -1(x + -7) = 0 Combine like terms: 1x + -12x = -11x (-4 + -11x + 3x2) + -1(x + -7) = 0 Reorder the terms: -4 + -11x + 3x2 + -1(-7 + x) = 0 -4 + -11x + 3x2 + (-7 * -1 + x * -1) = 0 -4 + -11x + 3x2 + (7 + -1x) = 0 Reorder the terms: -4 + 7 + -11x + -1x + 3x2 = 0 Combine like terms: -4 + 7 = 3 3 + -11x + -1x + 3x2 = 0 Combine like terms: -11x + -1x = -12x 3 + -12x + 3x2 = 0 Solving 3 + -12x + 3x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3'. 3(1 + -4x + x2) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(1 + -4x + x2)' equal to zero and attempt to solve: Simplifying 1 + -4x + x2 = 0 Solving 1 + -4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-1' to each side of the equation. 1 + -4x + -1 + x2 = 0 + -1 Reorder the terms: 1 + -1 + -4x + x2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -4x + x2 = 0 + -1 -4x + x2 = 0 + -1 Combine like terms: 0 + -1 = -1 -4x + x2 = -1 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = -1 + 4 Reorder the terms: 4 + -4x + x2 = -1 + 4 Combine like terms: -1 + 4 = 3 4 + -4x + x2 = 3 Factor a perfect square on the left side: (x + -2)(x + -2) = 3 Calculate the square root of the right side: 1.732050808 Break this problem into two subproblems by setting (x + -2) equal to 1.732050808 and -1.732050808.Subproblem 1
x + -2 = 1.732050808 Simplifying x + -2 = 1.732050808 Reorder the terms: -2 + x = 1.732050808 Solving -2 + x = 1.732050808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 1.732050808 + 2 Combine like terms: -2 + 2 = 0 0 + x = 1.732050808 + 2 x = 1.732050808 + 2 Combine like terms: 1.732050808 + 2 = 3.732050808 x = 3.732050808 Simplifying x = 3.732050808Subproblem 2
x + -2 = -1.732050808 Simplifying x + -2 = -1.732050808 Reorder the terms: -2 + x = -1.732050808 Solving -2 + x = -1.732050808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -1.732050808 + 2 Combine like terms: -2 + 2 = 0 0 + x = -1.732050808 + 2 x = -1.732050808 + 2 Combine like terms: -1.732050808 + 2 = 0.267949192 x = 0.267949192 Simplifying x = 0.267949192Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.732050808, 0.267949192}Solution
x = {3.732050808, 0.267949192}
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