(4x+5)(5x+22)=180

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Solution for (4x+5)(5x+22)=180 equation:


Simplifying
(4x + 5)(5x + 22) = 180

Reorder the terms:
(5 + 4x)(5x + 22) = 180

Reorder the terms:
(5 + 4x)(22 + 5x) = 180

Multiply (5 + 4x) * (22 + 5x)
(5(22 + 5x) + 4x * (22 + 5x)) = 180
((22 * 5 + 5x * 5) + 4x * (22 + 5x)) = 180
((110 + 25x) + 4x * (22 + 5x)) = 180
(110 + 25x + (22 * 4x + 5x * 4x)) = 180
(110 + 25x + (88x + 20x2)) = 180

Combine like terms: 25x + 88x = 113x
(110 + 113x + 20x2) = 180

Solving
110 + 113x + 20x2 = 180

Solving for variable 'x'.

Reorder the terms:
110 + -180 + 113x + 20x2 = 180 + -180

Combine like terms: 110 + -180 = -70
-70 + 113x + 20x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-70 + 113x + 20x2 = 0

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

Divide each side by '20'.
-3.5 + 5.65x + x2 = 0.0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + 5.65x + 3.5 + x2 = 0.0 + 3.5

Reorder the terms:
-3.5 + 3.5 + 5.65x + x2 = 0.0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + 5.65x + x2 = 0.0 + 3.5
5.65x + x2 = 0.0 + 3.5

Combine like terms: 0.0 + 3.5 = 3.5
5.65x + x2 = 3.5

The x term is 5.65x.  Take half its coefficient (2.825).
Square it (7.980625) and add it to both sides.

Add '7.980625' to each side of the equation.
5.65x + 7.980625 + x2 = 3.5 + 7.980625

Reorder the terms:
7.980625 + 5.65x + x2 = 3.5 + 7.980625

Combine like terms: 3.5 + 7.980625 = 11.480625
7.980625 + 5.65x + x2 = 11.480625

Factor a perfect square on the left side:
(x + 2.825)(x + 2.825) = 11.480625

Calculate the square root of the right side: 3.388307099

Break this problem into two subproblems by setting 
(x + 2.825) equal to 3.388307099 and -3.388307099.

Subproblem 1

x + 2.825 = 3.388307099 Simplifying x + 2.825 = 3.388307099 Reorder the terms: 2.825 + x = 3.388307099 Solving 2.825 + x = 3.388307099 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.825' to each side of the equation. 2.825 + -2.825 + x = 3.388307099 + -2.825 Combine like terms: 2.825 + -2.825 = 0.000 0.000 + x = 3.388307099 + -2.825 x = 3.388307099 + -2.825 Combine like terms: 3.388307099 + -2.825 = 0.563307099 x = 0.563307099 Simplifying x = 0.563307099

Subproblem 2

x + 2.825 = -3.388307099 Simplifying x + 2.825 = -3.388307099 Reorder the terms: 2.825 + x = -3.388307099 Solving 2.825 + x = -3.388307099 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.825' to each side of the equation. 2.825 + -2.825 + x = -3.388307099 + -2.825 Combine like terms: 2.825 + -2.825 = 0.000 0.000 + x = -3.388307099 + -2.825 x = -3.388307099 + -2.825 Combine like terms: -3.388307099 + -2.825 = -6.213307099 x = -6.213307099 Simplifying x = -6.213307099

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.563307099, -6.213307099}

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