(x-5)(3x+4)=x+4

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Solution for (x-5)(3x+4)=x+4 equation:


Simplifying
(x + -5)(3x + 4) = x + 4

Reorder the terms:
(-5 + x)(3x + 4) = x + 4

Reorder the terms:
(-5 + x)(4 + 3x) = x + 4

Multiply (-5 + x) * (4 + 3x)
(-5(4 + 3x) + x(4 + 3x)) = x + 4
((4 * -5 + 3x * -5) + x(4 + 3x)) = x + 4
((-20 + -15x) + x(4 + 3x)) = x + 4
(-20 + -15x + (4 * x + 3x * x)) = x + 4
(-20 + -15x + (4x + 3x2)) = x + 4

Combine like terms: -15x + 4x = -11x
(-20 + -11x + 3x2) = x + 4

Reorder the terms:
-20 + -11x + 3x2 = 4 + x

Solving
-20 + -11x + 3x2 = 4 + x

Solving for variable 'x'.

Reorder the terms:
-20 + -4 + -11x + -1x + 3x2 = 4 + x + -4 + -1x

Combine like terms: -20 + -4 = -24
-24 + -11x + -1x + 3x2 = 4 + x + -4 + -1x

Combine like terms: -11x + -1x = -12x
-24 + -12x + 3x2 = 4 + x + -4 + -1x

Reorder the terms:
-24 + -12x + 3x2 = 4 + -4 + x + -1x

Combine like terms: 4 + -4 = 0
-24 + -12x + 3x2 = 0 + x + -1x
-24 + -12x + 3x2 = x + -1x

Combine like terms: x + -1x = 0
-24 + -12x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-8 + -4x + x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-8 + -4x + x2)' equal to zero and attempt to solve: Simplifying -8 + -4x + x2 = 0 Solving -8 + -4x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '8' to each side of the equation. -8 + -4x + 8 + x2 = 0 + 8 Reorder the terms: -8 + 8 + -4x + x2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -4x + x2 = 0 + 8 -4x + x2 = 0 + 8 Combine like terms: 0 + 8 = 8 -4x + x2 = 8 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 = 8 + 4 Reorder the terms: 4 + -4x + x2 = 8 + 4 Combine like terms: 8 + 4 = 12 4 + -4x + x2 = 12 Factor a perfect square on the left side: (x + -2)(x + -2) = 12 Calculate the square root of the right side: 3.464101615 Break this problem into two subproblems by setting (x + -2) equal to 3.464101615 and -3.464101615.

Subproblem 1

x + -2 = 3.464101615 Simplifying x + -2 = 3.464101615 Reorder the terms: -2 + x = 3.464101615 Solving -2 + x = 3.464101615 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 = 3.464101615 + 2 Combine like terms: -2 + 2 = 0 0 + x = 3.464101615 + 2 x = 3.464101615 + 2 Combine like terms: 3.464101615 + 2 = 5.464101615 x = 5.464101615 Simplifying x = 5.464101615

Subproblem 2

x + -2 = -3.464101615 Simplifying x + -2 = -3.464101615 Reorder the terms: -2 + x = -3.464101615 Solving -2 + x = -3.464101615 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 = -3.464101615 + 2 Combine like terms: -2 + 2 = 0 0 + x = -3.464101615 + 2 x = -3.464101615 + 2 Combine like terms: -3.464101615 + 2 = -1.464101615 x = -1.464101615 Simplifying x = -1.464101615

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.464101615, -1.464101615}

Solution

x = {5.464101615, -1.464101615}

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