11x-5=4-5x^2

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Solution for 11x-5=4-5x^2 equation:


Simplifying
11x + -5 = 4 + -5x2

Reorder the terms:
-5 + 11x = 4 + -5x2

Solving
-5 + 11x = 4 + -5x2

Solving for variable 'x'.

Reorder the terms:
-5 + -4 + 11x + 5x2 = 4 + -5x2 + -4 + 5x2

Combine like terms: -5 + -4 = -9
-9 + 11x + 5x2 = 4 + -5x2 + -4 + 5x2

Reorder the terms:
-9 + 11x + 5x2 = 4 + -4 + -5x2 + 5x2

Combine like terms: 4 + -4 = 0
-9 + 11x + 5x2 = 0 + -5x2 + 5x2
-9 + 11x + 5x2 = -5x2 + 5x2

Combine like terms: -5x2 + 5x2 = 0
-9 + 11x + 5x2 = 0

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

Divide each side by '5'.
-1.8 + 2.2x + x2 = 0

Move the constant term to the right:

Add '1.8' to each side of the equation.
-1.8 + 2.2x + 1.8 + x2 = 0 + 1.8

Reorder the terms:
-1.8 + 1.8 + 2.2x + x2 = 0 + 1.8

Combine like terms: -1.8 + 1.8 = 0.0
0.0 + 2.2x + x2 = 0 + 1.8
2.2x + x2 = 0 + 1.8

Combine like terms: 0 + 1.8 = 1.8
2.2x + x2 = 1.8

The x term is 2.2x.  Take half its coefficient (1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
2.2x + 1.21 + x2 = 1.8 + 1.21

Reorder the terms:
1.21 + 2.2x + x2 = 1.8 + 1.21

Combine like terms: 1.8 + 1.21 = 3.01
1.21 + 2.2x + x2 = 3.01

Factor a perfect square on the left side:
(x + 1.1)(x + 1.1) = 3.01

Calculate the square root of the right side: 1.734935157

Break this problem into two subproblems by setting 
(x + 1.1) equal to 1.734935157 and -1.734935157.

Subproblem 1

x + 1.1 = 1.734935157 Simplifying x + 1.1 = 1.734935157 Reorder the terms: 1.1 + x = 1.734935157 Solving 1.1 + x = 1.734935157 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = 1.734935157 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = 1.734935157 + -1.1 x = 1.734935157 + -1.1 Combine like terms: 1.734935157 + -1.1 = 0.634935157 x = 0.634935157 Simplifying x = 0.634935157

Subproblem 2

x + 1.1 = -1.734935157 Simplifying x + 1.1 = -1.734935157 Reorder the terms: 1.1 + x = -1.734935157 Solving 1.1 + x = -1.734935157 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = -1.734935157 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = -1.734935157 + -1.1 x = -1.734935157 + -1.1 Combine like terms: -1.734935157 + -1.1 = -2.834935157 x = -2.834935157 Simplifying x = -2.834935157

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.634935157, -2.834935157}

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