2x(5x+5)=360

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Solution for 2x(5x+5)=360 equation:


Simplifying
2x(5x + 5) = 360

Reorder the terms:
2x(5 + 5x) = 360
(5 * 2x + 5x * 2x) = 360
(10x + 10x2) = 360

Solving
10x + 10x2 = 360

Solving for variable 'x'.

Reorder the terms:
-360 + 10x + 10x2 = 360 + -360

Combine like terms: 360 + -360 = 0
-360 + 10x + 10x2 = 0

Factor out the Greatest Common Factor (GCF), '10'.
10(-36 + x + x2) = 0

Ignore the factor 10.

Subproblem 1
Set the factor '(-36 + x + x2)' equal to zero and attempt to solve:

Simplifying
-36 + x + x2 = 0

Solving
-36 + x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + x + x2 = 0 + 36
x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
x + x2 = 36

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 36 + 0.25

Reorder the terms:
0.25 + x + x2 = 36 + 0.25

Combine like terms: 36 + 0.25 = 36.25
0.25 + x + x2 = 36.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 36.25

Calculate the square root of the right side: 6.020797289

Break this problem into two subproblems by setting 
(x + 0.5) equal to 6.020797289 and -6.020797289.


Subproblem 1
x + 0.5 = 6.020797289

Simplifying
x + 0.5 = 6.020797289

Reorder the terms:
0.5 + x = 6.020797289

Solving
0.5 + x = 6.020797289

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-0.5' to each side of the equation.
0.5 + -0.5 + x = 6.020797289 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + x = 6.020797289 + -0.5
x = 6.020797289 + -0.5

Combine like terms: 6.020797289 + -0.5 = 5.520797289
x = 5.520797289

Simplifying
x = 5.520797289


Subproblem 2
x + 0.5 = -6.020797289

Simplifying
x + 0.5 = -6.020797289

Reorder the terms:
0.5 + x = -6.020797289

Solving
0.5 + x = -6.020797289

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-0.5' to each side of the equation.
0.5 + -0.5 + x = -6.020797289 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + x = -6.020797289 + -0.5
x = -6.020797289 + -0.5

Combine like terms: -6.020797289 + -0.5 = -6.520797289
x = -6.520797289

Simplifying
x = -6.520797289


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {5.520797289, -6.520797289}
Solution
x = {5.520797289, -6.520797289}

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