5[x(4x-5)]=3-2x

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Solution for 5[x(4x-5)]=3-2x equation:


Simplifying
5[x(4x + -5)] = 3 + -2x

Reorder the terms:
5[x(-5 + 4x)] = 3 + -2x
5[(-5 * x + 4x * x)] = 3 + -2x
5[(-5x + 4x2)] = 3 + -2x
[-5x * 5 + 4x2 * 5] = 3 + -2x
[-25x + 20x2] = 3 + -2x

Solving
-25x + 20x2 = 3 + -2x

Solving for variable 'x'.

Reorder the terms:
-3 + -25x + 2x + 20x2 = 3 + -2x + -3 + 2x

Combine like terms: -25x + 2x = -23x
-3 + -23x + 20x2 = 3 + -2x + -3 + 2x

Reorder the terms:
-3 + -23x + 20x2 = 3 + -3 + -2x + 2x

Combine like terms: 3 + -3 = 0
-3 + -23x + 20x2 = 0 + -2x + 2x
-3 + -23x + 20x2 = -2x + 2x

Combine like terms: -2x + 2x = 0
-3 + -23x + 20x2 = 0

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

Divide each side by '20'.
-0.15 + -1.15x + x2 = 0.0

Move the constant term to the right:

Add '0.15' to each side of the equation.
-0.15 + -1.15x + 0.15 + x2 = 0.0 + 0.15

Reorder the terms:
-0.15 + 0.15 + -1.15x + x2 = 0.0 + 0.15

Combine like terms: -0.15 + 0.15 = 0.00
0.00 + -1.15x + x2 = 0.0 + 0.15
-1.15x + x2 = 0.0 + 0.15

Combine like terms: 0.0 + 0.15 = 0.15
-1.15x + x2 = 0.15

The x term is -1.15x.  Take half its coefficient (-0.575).
Square it (0.330625) and add it to both sides.

Add '0.330625' to each side of the equation.
-1.15x + 0.330625 + x2 = 0.15 + 0.330625

Reorder the terms:
0.330625 + -1.15x + x2 = 0.15 + 0.330625

Combine like terms: 0.15 + 0.330625 = 0.480625
0.330625 + -1.15x + x2 = 0.480625

Factor a perfect square on the left side:
(x + -0.575)(x + -0.575) = 0.480625

Calculate the square root of the right side: 0.693271231

Break this problem into two subproblems by setting 
(x + -0.575) equal to 0.693271231 and -0.693271231.

Subproblem 1

x + -0.575 = 0.693271231 Simplifying x + -0.575 = 0.693271231 Reorder the terms: -0.575 + x = 0.693271231 Solving -0.575 + x = 0.693271231 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.575' to each side of the equation. -0.575 + 0.575 + x = 0.693271231 + 0.575 Combine like terms: -0.575 + 0.575 = 0.000 0.000 + x = 0.693271231 + 0.575 x = 0.693271231 + 0.575 Combine like terms: 0.693271231 + 0.575 = 1.268271231 x = 1.268271231 Simplifying x = 1.268271231

Subproblem 2

x + -0.575 = -0.693271231 Simplifying x + -0.575 = -0.693271231 Reorder the terms: -0.575 + x = -0.693271231 Solving -0.575 + x = -0.693271231 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.575' to each side of the equation. -0.575 + 0.575 + x = -0.693271231 + 0.575 Combine like terms: -0.575 + 0.575 = 0.000 0.000 + x = -0.693271231 + 0.575 x = -0.693271231 + 0.575 Combine like terms: -0.693271231 + 0.575 = -0.118271231 x = -0.118271231 Simplifying x = -0.118271231

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.268271231, -0.118271231}

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