25x=2x^2+8

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Solution for 25x=2x^2+8 equation:


Simplifying
25x = 2x2 + 8

Reorder the terms:
25x = 8 + 2x2

Solving
25x = 8 + 2x2

Solving for variable 'x'.

Reorder the terms:
-8 + 25x + -2x2 = 8 + 2x2 + -8 + -2x2

Reorder the terms:
-8 + 25x + -2x2 = 8 + -8 + 2x2 + -2x2

Combine like terms: 8 + -8 = 0
-8 + 25x + -2x2 = 0 + 2x2 + -2x2
-8 + 25x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-8 + 25x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
4 + -12.5x + x2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -12.5x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + -12.5x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -12.5x + x2 = 0 + -4
-12.5x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
-12.5x + x2 = -4

The x term is -12.5x.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5x + 39.0625 + x2 = -4 + 39.0625

Reorder the terms:
39.0625 + -12.5x + x2 = -4 + 39.0625

Combine like terms: -4 + 39.0625 = 35.0625
39.0625 + -12.5x + x2 = 35.0625

Factor a perfect square on the left side:
(x + -6.25)(x + -6.25) = 35.0625

Calculate the square root of the right side: 5.921359641

Break this problem into two subproblems by setting 
(x + -6.25) equal to 5.921359641 and -5.921359641.

Subproblem 1

x + -6.25 = 5.921359641 Simplifying x + -6.25 = 5.921359641 Reorder the terms: -6.25 + x = 5.921359641 Solving -6.25 + x = 5.921359641 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = 5.921359641 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = 5.921359641 + 6.25 x = 5.921359641 + 6.25 Combine like terms: 5.921359641 + 6.25 = 12.171359641 x = 12.171359641 Simplifying x = 12.171359641

Subproblem 2

x + -6.25 = -5.921359641 Simplifying x + -6.25 = -5.921359641 Reorder the terms: -6.25 + x = -5.921359641 Solving -6.25 + x = -5.921359641 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = -5.921359641 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = -5.921359641 + 6.25 x = -5.921359641 + 6.25 Combine like terms: -5.921359641 + 6.25 = 0.328640359 x = 0.328640359 Simplifying x = 0.328640359

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.171359641, 0.328640359}

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