5x^2+12x+36=16x^2+24x+9

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Solution for 5x^2+12x+36=16x^2+24x+9 equation:


Simplifying
5x2 + 12x + 36 = 16x2 + 24x + 9

Reorder the terms:
36 + 12x + 5x2 = 16x2 + 24x + 9

Reorder the terms:
36 + 12x + 5x2 = 9 + 24x + 16x2

Solving
36 + 12x + 5x2 = 9 + 24x + 16x2

Solving for variable 'x'.

Reorder the terms:
36 + -9 + 12x + -24x + 5x2 + -16x2 = 9 + 24x + 16x2 + -9 + -24x + -16x2

Combine like terms: 36 + -9 = 27
27 + 12x + -24x + 5x2 + -16x2 = 9 + 24x + 16x2 + -9 + -24x + -16x2

Combine like terms: 12x + -24x = -12x
27 + -12x + 5x2 + -16x2 = 9 + 24x + 16x2 + -9 + -24x + -16x2

Combine like terms: 5x2 + -16x2 = -11x2
27 + -12x + -11x2 = 9 + 24x + 16x2 + -9 + -24x + -16x2

Reorder the terms:
27 + -12x + -11x2 = 9 + -9 + 24x + -24x + 16x2 + -16x2

Combine like terms: 9 + -9 = 0
27 + -12x + -11x2 = 0 + 24x + -24x + 16x2 + -16x2
27 + -12x + -11x2 = 24x + -24x + 16x2 + -16x2

Combine like terms: 24x + -24x = 0
27 + -12x + -11x2 = 0 + 16x2 + -16x2
27 + -12x + -11x2 = 16x2 + -16x2

Combine like terms: 16x2 + -16x2 = 0
27 + -12x + -11x2 = 0

Begin completing the square.  Divide all terms by
-11 the coefficient of the squared term: 

Divide each side by '-11'.
-2.454545455 + 1.090909091x + x2 = 0

Move the constant term to the right:

Add '2.454545455' to each side of the equation.
-2.454545455 + 1.090909091x + 2.454545455 + x2 = 0 + 2.454545455

Reorder the terms:
-2.454545455 + 2.454545455 + 1.090909091x + x2 = 0 + 2.454545455

Combine like terms: -2.454545455 + 2.454545455 = 0.000000000
0.000000000 + 1.090909091x + x2 = 0 + 2.454545455
1.090909091x + x2 = 0 + 2.454545455

Combine like terms: 0 + 2.454545455 = 2.454545455
1.090909091x + x2 = 2.454545455

The x term is 1.090909091x.  Take half its coefficient (0.5454545455).
Square it (0.2975206612) and add it to both sides.

Add '0.2975206612' to each side of the equation.
1.090909091x + 0.2975206612 + x2 = 2.454545455 + 0.2975206612

Reorder the terms:
0.2975206612 + 1.090909091x + x2 = 2.454545455 + 0.2975206612

Combine like terms: 2.454545455 + 0.2975206612 = 2.7520661162
0.2975206612 + 1.090909091x + x2 = 2.7520661162

Factor a perfect square on the left side:
(x + 0.5454545455)(x + 0.5454545455) = 2.7520661162

Calculate the square root of the right side: 1.658935236

Break this problem into two subproblems by setting 
(x + 0.5454545455) equal to 1.658935236 and -1.658935236.

Subproblem 1

x + 0.5454545455 = 1.658935236 Simplifying x + 0.5454545455 = 1.658935236 Reorder the terms: 0.5454545455 + x = 1.658935236 Solving 0.5454545455 + x = 1.658935236 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5454545455' to each side of the equation. 0.5454545455 + -0.5454545455 + x = 1.658935236 + -0.5454545455 Combine like terms: 0.5454545455 + -0.5454545455 = 0.0000000000 0.0000000000 + x = 1.658935236 + -0.5454545455 x = 1.658935236 + -0.5454545455 Combine like terms: 1.658935236 + -0.5454545455 = 1.1134806905 x = 1.1134806905 Simplifying x = 1.1134806905

Subproblem 2

x + 0.5454545455 = -1.658935236 Simplifying x + 0.5454545455 = -1.658935236 Reorder the terms: 0.5454545455 + x = -1.658935236 Solving 0.5454545455 + x = -1.658935236 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5454545455' to each side of the equation. 0.5454545455 + -0.5454545455 + x = -1.658935236 + -0.5454545455 Combine like terms: 0.5454545455 + -0.5454545455 = 0.0000000000 0.0000000000 + x = -1.658935236 + -0.5454545455 x = -1.658935236 + -0.5454545455 Combine like terms: -1.658935236 + -0.5454545455 = -2.2043897815 x = -2.2043897815 Simplifying x = -2.2043897815

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1134806905, -2.2043897815}

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