6x(x-5)+4x(5x-6)+3x+4=

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Solution for 6x(x-5)+4x(5x-6)+3x+4= equation:


Simplifying
6x(x + -5) + 4x(5x + -6) + 3x + 4 = 0

Reorder the terms:
6x(-5 + x) + 4x(5x + -6) + 3x + 4 = 0
(-5 * 6x + x * 6x) + 4x(5x + -6) + 3x + 4 = 0
(-30x + 6x2) + 4x(5x + -6) + 3x + 4 = 0

Reorder the terms:
-30x + 6x2 + 4x(-6 + 5x) + 3x + 4 = 0
-30x + 6x2 + (-6 * 4x + 5x * 4x) + 3x + 4 = 0
-30x + 6x2 + (-24x + 20x2) + 3x + 4 = 0

Reorder the terms:
4 + -30x + -24x + 3x + 6x2 + 20x2 = 0

Combine like terms: -30x + -24x = -54x
4 + -54x + 3x + 6x2 + 20x2 = 0

Combine like terms: -54x + 3x = -51x
4 + -51x + 6x2 + 20x2 = 0

Combine like terms: 6x2 + 20x2 = 26x2
4 + -51x + 26x2 = 0

Solving
4 + -51x + 26x2 = 0

Solving for variable 'x'.

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

Divide each side by '26'.
0.1538461538 + -1.961538462x + x2 = 0

Move the constant term to the right:

Add '-0.1538461538' to each side of the equation.
0.1538461538 + -1.961538462x + -0.1538461538 + x2 = 0 + -0.1538461538

Reorder the terms:
0.1538461538 + -0.1538461538 + -1.961538462x + x2 = 0 + -0.1538461538

Combine like terms: 0.1538461538 + -0.1538461538 = 0.0000000000
0.0000000000 + -1.961538462x + x2 = 0 + -0.1538461538
-1.961538462x + x2 = 0 + -0.1538461538

Combine like terms: 0 + -0.1538461538 = -0.1538461538
-1.961538462x + x2 = -0.1538461538

The x term is -1.961538462x.  Take half its coefficient (-0.980769231).
Square it (0.9619082845) and add it to both sides.

Add '0.9619082845' to each side of the equation.
-1.961538462x + 0.9619082845 + x2 = -0.1538461538 + 0.9619082845

Reorder the terms:
0.9619082845 + -1.961538462x + x2 = -0.1538461538 + 0.9619082845

Combine like terms: -0.1538461538 + 0.9619082845 = 0.8080621307
0.9619082845 + -1.961538462x + x2 = 0.8080621307

Factor a perfect square on the left side:
(x + -0.980769231)(x + -0.980769231) = 0.8080621307

Calculate the square root of the right side: 0.898922761

Break this problem into two subproblems by setting 
(x + -0.980769231) equal to 0.898922761 and -0.898922761.

Subproblem 1

x + -0.980769231 = 0.898922761 Simplifying x + -0.980769231 = 0.898922761 Reorder the terms: -0.980769231 + x = 0.898922761 Solving -0.980769231 + x = 0.898922761 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.980769231' to each side of the equation. -0.980769231 + 0.980769231 + x = 0.898922761 + 0.980769231 Combine like terms: -0.980769231 + 0.980769231 = 0.000000000 0.000000000 + x = 0.898922761 + 0.980769231 x = 0.898922761 + 0.980769231 Combine like terms: 0.898922761 + 0.980769231 = 1.879691992 x = 1.879691992 Simplifying x = 1.879691992

Subproblem 2

x + -0.980769231 = -0.898922761 Simplifying x + -0.980769231 = -0.898922761 Reorder the terms: -0.980769231 + x = -0.898922761 Solving -0.980769231 + x = -0.898922761 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.980769231' to each side of the equation. -0.980769231 + 0.980769231 + x = -0.898922761 + 0.980769231 Combine like terms: -0.980769231 + 0.980769231 = 0.000000000 0.000000000 + x = -0.898922761 + 0.980769231 x = -0.898922761 + 0.980769231 Combine like terms: -0.898922761 + 0.980769231 = 0.08184647 x = 0.08184647 Simplifying x = 0.08184647

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.879691992, 0.08184647}

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