3x*(2x+1)+(2x+5)*(2x-1)-50x-25=0

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Solution for 3x*(2x+1)+(2x+5)*(2x-1)-50x-25=0 equation:


Simplifying
3x(2x + 1) + (2x + 5)(2x + -1) + -50x + -25 = 0

Reorder the terms:
3x(1 + 2x) + (2x + 5)(2x + -1) + -50x + -25 = 0
(1 * 3x + 2x * 3x) + (2x + 5)(2x + -1) + -50x + -25 = 0
(3x + 6x2) + (2x + 5)(2x + -1) + -50x + -25 = 0

Reorder the terms:
3x + 6x2 + (5 + 2x)(2x + -1) + -50x + -25 = 0

Reorder the terms:
3x + 6x2 + (5 + 2x)(-1 + 2x) + -50x + -25 = 0

Multiply (5 + 2x) * (-1 + 2x)
3x + 6x2 + (5(-1 + 2x) + 2x * (-1 + 2x)) + -50x + -25 = 0
3x + 6x2 + ((-1 * 5 + 2x * 5) + 2x * (-1 + 2x)) + -50x + -25 = 0
3x + 6x2 + ((-5 + 10x) + 2x * (-1 + 2x)) + -50x + -25 = 0
3x + 6x2 + (-5 + 10x + (-1 * 2x + 2x * 2x)) + -50x + -25 = 0
3x + 6x2 + (-5 + 10x + (-2x + 4x2)) + -50x + -25 = 0

Combine like terms: 10x + -2x = 8x
3x + 6x2 + (-5 + 8x + 4x2) + -50x + -25 = 0

Reorder the terms:
-5 + -25 + 3x + 8x + -50x + 6x2 + 4x2 = 0

Combine like terms: -5 + -25 = -30
-30 + 3x + 8x + -50x + 6x2 + 4x2 = 0

Combine like terms: 3x + 8x = 11x
-30 + 11x + -50x + 6x2 + 4x2 = 0

Combine like terms: 11x + -50x = -39x
-30 + -39x + 6x2 + 4x2 = 0

Combine like terms: 6x2 + 4x2 = 10x2
-30 + -39x + 10x2 = 0

Solving
-30 + -39x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
-3 + -3.9x + x2 = 0.0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -3.9x + 3 + x2 = 0.0 + 3

Reorder the terms:
-3 + 3 + -3.9x + x2 = 0.0 + 3

Combine like terms: -3 + 3 = 0
0 + -3.9x + x2 = 0.0 + 3
-3.9x + x2 = 0.0 + 3

Combine like terms: 0.0 + 3 = 3
-3.9x + x2 = 3

The x term is -3.9x.  Take half its coefficient (-1.95).
Square it (3.8025) and add it to both sides.

Add '3.8025' to each side of the equation.
-3.9x + 3.8025 + x2 = 3 + 3.8025

Reorder the terms:
3.8025 + -3.9x + x2 = 3 + 3.8025

Combine like terms: 3 + 3.8025 = 6.8025
3.8025 + -3.9x + x2 = 6.8025

Factor a perfect square on the left side:
(x + -1.95)(x + -1.95) = 6.8025

Calculate the square root of the right side: 2.608160271

Break this problem into two subproblems by setting 
(x + -1.95) equal to 2.608160271 and -2.608160271.

Subproblem 1

x + -1.95 = 2.608160271 Simplifying x + -1.95 = 2.608160271 Reorder the terms: -1.95 + x = 2.608160271 Solving -1.95 + x = 2.608160271 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.95' to each side of the equation. -1.95 + 1.95 + x = 2.608160271 + 1.95 Combine like terms: -1.95 + 1.95 = 0.00 0.00 + x = 2.608160271 + 1.95 x = 2.608160271 + 1.95 Combine like terms: 2.608160271 + 1.95 = 4.558160271 x = 4.558160271 Simplifying x = 4.558160271

Subproblem 2

x + -1.95 = -2.608160271 Simplifying x + -1.95 = -2.608160271 Reorder the terms: -1.95 + x = -2.608160271 Solving -1.95 + x = -2.608160271 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.95' to each side of the equation. -1.95 + 1.95 + x = -2.608160271 + 1.95 Combine like terms: -1.95 + 1.95 = 0.00 0.00 + x = -2.608160271 + 1.95 x = -2.608160271 + 1.95 Combine like terms: -2.608160271 + 1.95 = -0.658160271 x = -0.658160271 Simplifying x = -0.658160271

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.558160271, -0.658160271}

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