-4x(2x-3)=-8x+5

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Solution for -4x(2x-3)=-8x+5 equation:


Simplifying
-4x(2x + -3) = -8x + 5

Reorder the terms:
-4x(-3 + 2x) = -8x + 5
(-3 * -4x + 2x * -4x) = -8x + 5
(12x + -8x2) = -8x + 5

Reorder the terms:
12x + -8x2 = 5 + -8x

Solving
12x + -8x2 = 5 + -8x

Solving for variable 'x'.

Reorder the terms:
-5 + 12x + 8x + -8x2 = 5 + -8x + -5 + 8x

Combine like terms: 12x + 8x = 20x
-5 + 20x + -8x2 = 5 + -8x + -5 + 8x

Reorder the terms:
-5 + 20x + -8x2 = 5 + -5 + -8x + 8x

Combine like terms: 5 + -5 = 0
-5 + 20x + -8x2 = 0 + -8x + 8x
-5 + 20x + -8x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
-5 + 20x + -8x2 = 0

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

Divide each side by '-8'.
0.625 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-0.625' to each side of the equation.
0.625 + -2.5x + -0.625 + x2 = 0 + -0.625

Reorder the terms:
0.625 + -0.625 + -2.5x + x2 = 0 + -0.625

Combine like terms: 0.625 + -0.625 = 0.000
0.000 + -2.5x + x2 = 0 + -0.625
-2.5x + x2 = 0 + -0.625

Combine like terms: 0 + -0.625 = -0.625
-2.5x + x2 = -0.625

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = -0.625 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = -0.625 + 1.5625

Combine like terms: -0.625 + 1.5625 = 0.9375
1.5625 + -2.5x + x2 = 0.9375

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 0.9375

Calculate the square root of the right side: 0.968245837

Break this problem into two subproblems by setting 
(x + -1.25) equal to 0.968245837 and -0.968245837.

Subproblem 1

x + -1.25 = 0.968245837 Simplifying x + -1.25 = 0.968245837 Reorder the terms: -1.25 + x = 0.968245837 Solving -1.25 + x = 0.968245837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 0.968245837 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 0.968245837 + 1.25 x = 0.968245837 + 1.25 Combine like terms: 0.968245837 + 1.25 = 2.218245837 x = 2.218245837 Simplifying x = 2.218245837

Subproblem 2

x + -1.25 = -0.968245837 Simplifying x + -1.25 = -0.968245837 Reorder the terms: -1.25 + x = -0.968245837 Solving -1.25 + x = -0.968245837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -0.968245837 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -0.968245837 + 1.25 x = -0.968245837 + 1.25 Combine like terms: -0.968245837 + 1.25 = 0.281754163 x = 0.281754163 Simplifying x = 0.281754163

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.218245837, 0.281754163}

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