2x*(4x+2)-(9x+36)+18x=10x-11

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Solution for 2x*(4x+2)-(9x+36)+18x=10x-11 equation:


Simplifying
2x(4x + 2) + -1(9x + 36) + 18x = 10x + -11

Reorder the terms:
2x(2 + 4x) + -1(9x + 36) + 18x = 10x + -11
(2 * 2x + 4x * 2x) + -1(9x + 36) + 18x = 10x + -11
(4x + 8x2) + -1(9x + 36) + 18x = 10x + -11

Reorder the terms:
4x + 8x2 + -1(36 + 9x) + 18x = 10x + -11
4x + 8x2 + (36 * -1 + 9x * -1) + 18x = 10x + -11
4x + 8x2 + (-36 + -9x) + 18x = 10x + -11

Reorder the terms:
-36 + 4x + -9x + 18x + 8x2 = 10x + -11

Combine like terms: 4x + -9x = -5x
-36 + -5x + 18x + 8x2 = 10x + -11

Combine like terms: -5x + 18x = 13x
-36 + 13x + 8x2 = 10x + -11

Reorder the terms:
-36 + 13x + 8x2 = -11 + 10x

Solving
-36 + 13x + 8x2 = -11 + 10x

Solving for variable 'x'.

Reorder the terms:
-36 + 11 + 13x + -10x + 8x2 = -11 + 10x + 11 + -10x

Combine like terms: -36 + 11 = -25
-25 + 13x + -10x + 8x2 = -11 + 10x + 11 + -10x

Combine like terms: 13x + -10x = 3x
-25 + 3x + 8x2 = -11 + 10x + 11 + -10x

Reorder the terms:
-25 + 3x + 8x2 = -11 + 11 + 10x + -10x

Combine like terms: -11 + 11 = 0
-25 + 3x + 8x2 = 0 + 10x + -10x
-25 + 3x + 8x2 = 10x + -10x

Combine like terms: 10x + -10x = 0
-25 + 3x + 8x2 = 0

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

Divide each side by '8'.
-3.125 + 0.375x + x2 = 0

Move the constant term to the right:

Add '3.125' to each side of the equation.
-3.125 + 0.375x + 3.125 + x2 = 0 + 3.125

Reorder the terms:
-3.125 + 3.125 + 0.375x + x2 = 0 + 3.125

Combine like terms: -3.125 + 3.125 = 0.000
0.000 + 0.375x + x2 = 0 + 3.125
0.375x + x2 = 0 + 3.125

Combine like terms: 0 + 3.125 = 3.125
0.375x + x2 = 3.125

The x term is 0.375x.  Take half its coefficient (0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
0.375x + 0.03515625 + x2 = 3.125 + 0.03515625

Reorder the terms:
0.03515625 + 0.375x + x2 = 3.125 + 0.03515625

Combine like terms: 3.125 + 0.03515625 = 3.16015625
0.03515625 + 0.375x + x2 = 3.16015625

Factor a perfect square on the left side:
(x + 0.1875)(x + 0.1875) = 3.16015625

Calculate the square root of the right side: 1.777682832

Break this problem into two subproblems by setting 
(x + 0.1875) equal to 1.777682832 and -1.777682832.

Subproblem 1

x + 0.1875 = 1.777682832 Simplifying x + 0.1875 = 1.777682832 Reorder the terms: 0.1875 + x = 1.777682832 Solving 0.1875 + x = 1.777682832 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + x = 1.777682832 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + x = 1.777682832 + -0.1875 x = 1.777682832 + -0.1875 Combine like terms: 1.777682832 + -0.1875 = 1.590182832 x = 1.590182832 Simplifying x = 1.590182832

Subproblem 2

x + 0.1875 = -1.777682832 Simplifying x + 0.1875 = -1.777682832 Reorder the terms: 0.1875 + x = -1.777682832 Solving 0.1875 + x = -1.777682832 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1875' to each side of the equation. 0.1875 + -0.1875 + x = -1.777682832 + -0.1875 Combine like terms: 0.1875 + -0.1875 = 0.0000 0.0000 + x = -1.777682832 + -0.1875 x = -1.777682832 + -0.1875 Combine like terms: -1.777682832 + -0.1875 = -1.965182832 x = -1.965182832 Simplifying x = -1.965182832

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.590182832, -1.965182832}

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