6x^2+5=40x-10x^2

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Solution for 6x^2+5=40x-10x^2 equation:


Simplifying
6x2 + 5 = 40x + -10x2

Reorder the terms:
5 + 6x2 = 40x + -10x2

Solving
5 + 6x2 = 40x + -10x2

Solving for variable 'x'.

Reorder the terms:
5 + -40x + 6x2 + 10x2 = 40x + -10x2 + -40x + 10x2

Combine like terms: 6x2 + 10x2 = 16x2
5 + -40x + 16x2 = 40x + -10x2 + -40x + 10x2

Reorder the terms:
5 + -40x + 16x2 = 40x + -40x + -10x2 + 10x2

Combine like terms: 40x + -40x = 0
5 + -40x + 16x2 = 0 + -10x2 + 10x2
5 + -40x + 16x2 = -10x2 + 10x2

Combine like terms: -10x2 + 10x2 = 0
5 + -40x + 16x2 = 0

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

Divide each side by '16'.
0.3125 + -2.5x + x2 = 0

Move the constant term to the right:

Add '-0.3125' to each side of the equation.
0.3125 + -2.5x + -0.3125 + x2 = 0 + -0.3125

Reorder the terms:
0.3125 + -0.3125 + -2.5x + x2 = 0 + -0.3125

Combine like terms: 0.3125 + -0.3125 = 0.0000
0.0000 + -2.5x + x2 = 0 + -0.3125
-2.5x + x2 = 0 + -0.3125

Combine like terms: 0 + -0.3125 = -0.3125
-2.5x + x2 = -0.3125

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = -0.3125 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = -0.3125 + 1.5625

Combine like terms: -0.3125 + 1.5625 = 1.25
1.5625 + -2.5x + x2 = 1.25

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(x + -1.25) equal to 1.118033989 and -1.118033989.

Subproblem 1

x + -1.25 = 1.118033989 Simplifying x + -1.25 = 1.118033989 Reorder the terms: -1.25 + x = 1.118033989 Solving -1.25 + x = 1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 1.118033989 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 1.118033989 + 1.25 x = 1.118033989 + 1.25 Combine like terms: 1.118033989 + 1.25 = 2.368033989 x = 2.368033989 Simplifying x = 2.368033989

Subproblem 2

x + -1.25 = -1.118033989 Simplifying x + -1.25 = -1.118033989 Reorder the terms: -1.25 + x = -1.118033989 Solving -1.25 + x = -1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -1.118033989 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -1.118033989 + 1.25 x = -1.118033989 + 1.25 Combine like terms: -1.118033989 + 1.25 = 0.131966011 x = 0.131966011 Simplifying x = 0.131966011

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.368033989, 0.131966011}

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