(2x-4)(2x-4)=75

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Solution for (2x-4)(2x-4)=75 equation:


Simplifying
(2x + -4)(2x + -4) = 75

Reorder the terms:
(-4 + 2x)(2x + -4) = 75

Reorder the terms:
(-4 + 2x)(-4 + 2x) = 75

Multiply (-4 + 2x) * (-4 + 2x)
(-4(-4 + 2x) + 2x * (-4 + 2x)) = 75
((-4 * -4 + 2x * -4) + 2x * (-4 + 2x)) = 75
((16 + -8x) + 2x * (-4 + 2x)) = 75
(16 + -8x + (-4 * 2x + 2x * 2x)) = 75
(16 + -8x + (-8x + 4x2)) = 75

Combine like terms: -8x + -8x = -16x
(16 + -16x + 4x2) = 75

Solving
16 + -16x + 4x2 = 75

Solving for variable 'x'.

Reorder the terms:
16 + -75 + -16x + 4x2 = 75 + -75

Combine like terms: 16 + -75 = -59
-59 + -16x + 4x2 = 75 + -75

Combine like terms: 75 + -75 = 0
-59 + -16x + 4x2 = 0

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

Divide each side by '4'.
-14.75 + -4x + x2 = 0

Move the constant term to the right:

Add '14.75' to each side of the equation.
-14.75 + -4x + 14.75 + x2 = 0 + 14.75

Reorder the terms:
-14.75 + 14.75 + -4x + x2 = 0 + 14.75

Combine like terms: -14.75 + 14.75 = 0.00
0.00 + -4x + x2 = 0 + 14.75
-4x + x2 = 0 + 14.75

Combine like terms: 0 + 14.75 = 14.75
-4x + x2 = 14.75

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 = 14.75 + 4

Reorder the terms:
4 + -4x + x2 = 14.75 + 4

Combine like terms: 14.75 + 4 = 18.75
4 + -4x + x2 = 18.75

Factor a perfect square on the left side:
(x + -2)(x + -2) = 18.75

Calculate the square root of the right side: 4.330127019

Break this problem into two subproblems by setting 
(x + -2) equal to 4.330127019 and -4.330127019.

Subproblem 1

x + -2 = 4.330127019 Simplifying x + -2 = 4.330127019 Reorder the terms: -2 + x = 4.330127019 Solving -2 + x = 4.330127019 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 = 4.330127019 + 2 Combine like terms: -2 + 2 = 0 0 + x = 4.330127019 + 2 x = 4.330127019 + 2 Combine like terms: 4.330127019 + 2 = 6.330127019 x = 6.330127019 Simplifying x = 6.330127019

Subproblem 2

x + -2 = -4.330127019 Simplifying x + -2 = -4.330127019 Reorder the terms: -2 + x = -4.330127019 Solving -2 + x = -4.330127019 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 = -4.330127019 + 2 Combine like terms: -2 + 2 = 0 0 + x = -4.330127019 + 2 x = -4.330127019 + 2 Combine like terms: -4.330127019 + 2 = -2.330127019 x = -2.330127019 Simplifying x = -2.330127019

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.330127019, -2.330127019}

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