2X^2-25X=1

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Solution for 2X^2-25X=1 equation:


Simplifying
2X2 + -25X = 1

Reorder the terms:
-25X + 2X2 = 1

Solving
-25X + 2X2 = 1

Solving for variable 'X'.

Reorder the terms:
-1 + -25X + 2X2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + -25X + 2X2 = 0

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

Divide each side by '2'.
-0.5 + -12.5X + X2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -12.5X + 0.5 + X2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -12.5X + X2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -12.5X + X2 = 0 + 0.5
-12.5X + X2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-12.5X + X2 = 0.5

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 = 0.5 + 39.0625

Reorder the terms:
39.0625 + -12.5X + X2 = 0.5 + 39.0625

Combine like terms: 0.5 + 39.0625 = 39.5625
39.0625 + -12.5X + X2 = 39.5625

Factor a perfect square on the left side:
(X + -6.25)(X + -6.25) = 39.5625

Calculate the square root of the right side: 6.289872813

Break this problem into two subproblems by setting 
(X + -6.25) equal to 6.289872813 and -6.289872813.

Subproblem 1

X + -6.25 = 6.289872813 Simplifying X + -6.25 = 6.289872813 Reorder the terms: -6.25 + X = 6.289872813 Solving -6.25 + X = 6.289872813 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 = 6.289872813 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + X = 6.289872813 + 6.25 X = 6.289872813 + 6.25 Combine like terms: 6.289872813 + 6.25 = 12.539872813 X = 12.539872813 Simplifying X = 12.539872813

Subproblem 2

X + -6.25 = -6.289872813 Simplifying X + -6.25 = -6.289872813 Reorder the terms: -6.25 + X = -6.289872813 Solving -6.25 + X = -6.289872813 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 = -6.289872813 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + X = -6.289872813 + 6.25 X = -6.289872813 + 6.25 Combine like terms: -6.289872813 + 6.25 = -0.039872813 X = -0.039872813 Simplifying X = -0.039872813

Solution

The solution to the problem is based on the solutions from the subproblems. X = {12.539872813, -0.039872813}

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