(2x+5)(3x-7)+2(4x+9)(5x+6)=

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Solution for (2x+5)(3x-7)+2(4x+9)(5x+6)= equation:


Simplifying
(2x + 5)(3x + -7) + 2(4x + 9)(5x + 6) = 0

Reorder the terms:
(5 + 2x)(3x + -7) + 2(4x + 9)(5x + 6) = 0

Reorder the terms:
(5 + 2x)(-7 + 3x) + 2(4x + 9)(5x + 6) = 0

Multiply (5 + 2x) * (-7 + 3x)
(5(-7 + 3x) + 2x * (-7 + 3x)) + 2(4x + 9)(5x + 6) = 0
((-7 * 5 + 3x * 5) + 2x * (-7 + 3x)) + 2(4x + 9)(5x + 6) = 0
((-35 + 15x) + 2x * (-7 + 3x)) + 2(4x + 9)(5x + 6) = 0
(-35 + 15x + (-7 * 2x + 3x * 2x)) + 2(4x + 9)(5x + 6) = 0
(-35 + 15x + (-14x + 6x2)) + 2(4x + 9)(5x + 6) = 0

Combine like terms: 15x + -14x = 1x
(-35 + 1x + 6x2) + 2(4x + 9)(5x + 6) = 0

Reorder the terms:
-35 + 1x + 6x2 + 2(9 + 4x)(5x + 6) = 0

Reorder the terms:
-35 + 1x + 6x2 + 2(9 + 4x)(6 + 5x) = 0

Multiply (9 + 4x) * (6 + 5x)
-35 + 1x + 6x2 + 2(9(6 + 5x) + 4x * (6 + 5x)) = 0
-35 + 1x + 6x2 + 2((6 * 9 + 5x * 9) + 4x * (6 + 5x)) = 0
-35 + 1x + 6x2 + 2((54 + 45x) + 4x * (6 + 5x)) = 0
-35 + 1x + 6x2 + 2(54 + 45x + (6 * 4x + 5x * 4x)) = 0
-35 + 1x + 6x2 + 2(54 + 45x + (24x + 20x2)) = 0

Combine like terms: 45x + 24x = 69x
-35 + 1x + 6x2 + 2(54 + 69x + 20x2) = 0
-35 + 1x + 6x2 + (54 * 2 + 69x * 2 + 20x2 * 2) = 0
-35 + 1x + 6x2 + (108 + 138x + 40x2) = 0

Reorder the terms:
-35 + 108 + 1x + 138x + 6x2 + 40x2 = 0

Combine like terms: -35 + 108 = 73
73 + 1x + 138x + 6x2 + 40x2 = 0

Combine like terms: 1x + 138x = 139x
73 + 139x + 6x2 + 40x2 = 0

Combine like terms: 6x2 + 40x2 = 46x2
73 + 139x + 46x2 = 0

Solving
73 + 139x + 46x2 = 0

Solving for variable 'x'.

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

Divide each side by '46'.
1.586956522 + 3.02173913x + x2 = 0

Move the constant term to the right:

Add '-1.586956522' to each side of the equation.
1.586956522 + 3.02173913x + -1.586956522 + x2 = 0 + -1.586956522

Reorder the terms:
1.586956522 + -1.586956522 + 3.02173913x + x2 = 0 + -1.586956522

Combine like terms: 1.586956522 + -1.586956522 = 0.000000000
0.000000000 + 3.02173913x + x2 = 0 + -1.586956522
3.02173913x + x2 = 0 + -1.586956522

Combine like terms: 0 + -1.586956522 = -1.586956522
3.02173913x + x2 = -1.586956522

The x term is 3.02173913x.  Take half its coefficient (1.510869565).
Square it (2.282726842) and add it to both sides.

Add '2.282726842' to each side of the equation.
3.02173913x + 2.282726842 + x2 = -1.586956522 + 2.282726842

Reorder the terms:
2.282726842 + 3.02173913x + x2 = -1.586956522 + 2.282726842

Combine like terms: -1.586956522 + 2.282726842 = 0.69577032
2.282726842 + 3.02173913x + x2 = 0.69577032

Factor a perfect square on the left side:
(x + 1.510869565)(x + 1.510869565) = 0.69577032

Calculate the square root of the right side: 0.834128479

Break this problem into two subproblems by setting 
(x + 1.510869565) equal to 0.834128479 and -0.834128479.

Subproblem 1

x + 1.510869565 = 0.834128479 Simplifying x + 1.510869565 = 0.834128479 Reorder the terms: 1.510869565 + x = 0.834128479 Solving 1.510869565 + x = 0.834128479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.510869565' to each side of the equation. 1.510869565 + -1.510869565 + x = 0.834128479 + -1.510869565 Combine like terms: 1.510869565 + -1.510869565 = 0.000000000 0.000000000 + x = 0.834128479 + -1.510869565 x = 0.834128479 + -1.510869565 Combine like terms: 0.834128479 + -1.510869565 = -0.676741086 x = -0.676741086 Simplifying x = -0.676741086

Subproblem 2

x + 1.510869565 = -0.834128479 Simplifying x + 1.510869565 = -0.834128479 Reorder the terms: 1.510869565 + x = -0.834128479 Solving 1.510869565 + x = -0.834128479 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.510869565' to each side of the equation. 1.510869565 + -1.510869565 + x = -0.834128479 + -1.510869565 Combine like terms: 1.510869565 + -1.510869565 = 0.000000000 0.000000000 + x = -0.834128479 + -1.510869565 x = -0.834128479 + -1.510869565 Combine like terms: -0.834128479 + -1.510869565 = -2.344998044 x = -2.344998044 Simplifying x = -2.344998044

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.676741086, -2.344998044}

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