4x^2=41-8x

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Solution for 4x^2=41-8x equation:


Simplifying
4x2 = 41 + -8x

Solving
4x2 = 41 + -8x

Solving for variable 'x'.

Reorder the terms:
-41 + 8x + 4x2 = 41 + -8x + -41 + 8x

Reorder the terms:
-41 + 8x + 4x2 = 41 + -41 + -8x + 8x

Combine like terms: 41 + -41 = 0
-41 + 8x + 4x2 = 0 + -8x + 8x
-41 + 8x + 4x2 = -8x + 8x

Combine like terms: -8x + 8x = 0
-41 + 8x + 4x2 = 0

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

Divide each side by '4'.
-10.25 + 2x + x2 = 0

Move the constant term to the right:

Add '10.25' to each side of the equation.
-10.25 + 2x + 10.25 + x2 = 0 + 10.25

Reorder the terms:
-10.25 + 10.25 + 2x + x2 = 0 + 10.25

Combine like terms: -10.25 + 10.25 = 0.00
0.00 + 2x + x2 = 0 + 10.25
2x + x2 = 0 + 10.25

Combine like terms: 0 + 10.25 = 10.25
2x + x2 = 10.25

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 10.25 + 1

Reorder the terms:
1 + 2x + x2 = 10.25 + 1

Combine like terms: 10.25 + 1 = 11.25
1 + 2x + x2 = 11.25

Factor a perfect square on the left side:
(x + 1)(x + 1) = 11.25

Calculate the square root of the right side: 3.354101966

Break this problem into two subproblems by setting 
(x + 1) equal to 3.354101966 and -3.354101966.

Subproblem 1

x + 1 = 3.354101966 Simplifying x + 1 = 3.354101966 Reorder the terms: 1 + x = 3.354101966 Solving 1 + x = 3.354101966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 3.354101966 + -1 Combine like terms: 1 + -1 = 0 0 + x = 3.354101966 + -1 x = 3.354101966 + -1 Combine like terms: 3.354101966 + -1 = 2.354101966 x = 2.354101966 Simplifying x = 2.354101966

Subproblem 2

x + 1 = -3.354101966 Simplifying x + 1 = -3.354101966 Reorder the terms: 1 + x = -3.354101966 Solving 1 + x = -3.354101966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -3.354101966 + -1 Combine like terms: 1 + -1 = 0 0 + x = -3.354101966 + -1 x = -3.354101966 + -1 Combine like terms: -3.354101966 + -1 = -4.354101966 x = -4.354101966 Simplifying x = -4.354101966

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.354101966, -4.354101966}

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