(2x-7)(4x-3)=112

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Solution for (2x-7)(4x-3)=112 equation:


Simplifying
(2x + -7)(4x + -3) = 112

Reorder the terms:
(-7 + 2x)(4x + -3) = 112

Reorder the terms:
(-7 + 2x)(-3 + 4x) = 112

Multiply (-7 + 2x) * (-3 + 4x)
(-7(-3 + 4x) + 2x * (-3 + 4x)) = 112
((-3 * -7 + 4x * -7) + 2x * (-3 + 4x)) = 112
((21 + -28x) + 2x * (-3 + 4x)) = 112
(21 + -28x + (-3 * 2x + 4x * 2x)) = 112
(21 + -28x + (-6x + 8x2)) = 112

Combine like terms: -28x + -6x = -34x
(21 + -34x + 8x2) = 112

Solving
21 + -34x + 8x2 = 112

Solving for variable 'x'.

Reorder the terms:
21 + -112 + -34x + 8x2 = 112 + -112

Combine like terms: 21 + -112 = -91
-91 + -34x + 8x2 = 112 + -112

Combine like terms: 112 + -112 = 0
-91 + -34x + 8x2 = 0

Begin completing the square.  Divide all terms by
8 the coefficient of the squared term: 

Divide each side by '8'.
-11.375 + -4.25x + x2 = 0

Move the constant term to the right:

Add '11.375' to each side of the equation.
-11.375 + -4.25x + 11.375 + x2 = 0 + 11.375

Reorder the terms:
-11.375 + 11.375 + -4.25x + x2 = 0 + 11.375

Combine like terms: -11.375 + 11.375 = 0.000
0.000 + -4.25x + x2 = 0 + 11.375
-4.25x + x2 = 0 + 11.375

Combine like terms: 0 + 11.375 = 11.375
-4.25x + x2 = 11.375

The x term is -4.25x.  Take half its coefficient (-2.125).
Square it (4.515625) and add it to both sides.

Add '4.515625' to each side of the equation.
-4.25x + 4.515625 + x2 = 11.375 + 4.515625

Reorder the terms:
4.515625 + -4.25x + x2 = 11.375 + 4.515625

Combine like terms: 11.375 + 4.515625 = 15.890625
4.515625 + -4.25x + x2 = 15.890625

Factor a perfect square on the left side:
(x + -2.125)(x + -2.125) = 15.890625

Calculate the square root of the right side: 3.98630468

Break this problem into two subproblems by setting 
(x + -2.125) equal to 3.98630468 and -3.98630468.

Subproblem 1

x + -2.125 = 3.98630468 Simplifying x + -2.125 = 3.98630468 Reorder the terms: -2.125 + x = 3.98630468 Solving -2.125 + x = 3.98630468 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = 3.98630468 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = 3.98630468 + 2.125 x = 3.98630468 + 2.125 Combine like terms: 3.98630468 + 2.125 = 6.11130468 x = 6.11130468 Simplifying x = 6.11130468

Subproblem 2

x + -2.125 = -3.98630468 Simplifying x + -2.125 = -3.98630468 Reorder the terms: -2.125 + x = -3.98630468 Solving -2.125 + x = -3.98630468 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = -3.98630468 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = -3.98630468 + 2.125 x = -3.98630468 + 2.125 Combine like terms: -3.98630468 + 2.125 = -1.86130468 x = -1.86130468 Simplifying x = -1.86130468

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.11130468, -1.86130468}

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