2x^2-11=-25x

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Solution for 2x^2-11=-25x equation:


Simplifying
2x2 + -11 = -25x

Reorder the terms:
-11 + 2x2 = -25x

Solving
-11 + 2x2 = -25x

Solving for variable 'x'.

Reorder the terms:
-11 + 25x + 2x2 = -25x + 25x

Combine like terms: -25x + 25x = 0
-11 + 25x + 2x2 = 0

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

Divide each side by '2'.
-5.5 + 12.5x + x2 = 0

Move the constant term to the right:

Add '5.5' to each side of the equation.
-5.5 + 12.5x + 5.5 + x2 = 0 + 5.5

Reorder the terms:
-5.5 + 5.5 + 12.5x + x2 = 0 + 5.5

Combine like terms: -5.5 + 5.5 = 0.0
0.0 + 12.5x + x2 = 0 + 5.5
12.5x + x2 = 0 + 5.5

Combine like terms: 0 + 5.5 = 5.5
12.5x + x2 = 5.5

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 = 5.5 + 39.0625

Reorder the terms:
39.0625 + 12.5x + x2 = 5.5 + 39.0625

Combine like terms: 5.5 + 39.0625 = 44.5625
39.0625 + 12.5x + x2 = 44.5625

Factor a perfect square on the left side:
(x + 6.25)(x + 6.25) = 44.5625

Calculate the square root of the right side: 6.675514961

Break this problem into two subproblems by setting 
(x + 6.25) equal to 6.675514961 and -6.675514961.

Subproblem 1

x + 6.25 = 6.675514961 Simplifying x + 6.25 = 6.675514961 Reorder the terms: 6.25 + x = 6.675514961 Solving 6.25 + x = 6.675514961 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 = 6.675514961 + -6.25 Combine like terms: 6.25 + -6.25 = 0.00 0.00 + x = 6.675514961 + -6.25 x = 6.675514961 + -6.25 Combine like terms: 6.675514961 + -6.25 = 0.425514961 x = 0.425514961 Simplifying x = 0.425514961

Subproblem 2

x + 6.25 = -6.675514961 Simplifying x + 6.25 = -6.675514961 Reorder the terms: 6.25 + x = -6.675514961 Solving 6.25 + x = -6.675514961 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 = -6.675514961 + -6.25 Combine like terms: 6.25 + -6.25 = 0.00 0.00 + x = -6.675514961 + -6.25 x = -6.675514961 + -6.25 Combine like terms: -6.675514961 + -6.25 = -12.925514961 x = -12.925514961 Simplifying x = -12.925514961

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.425514961, -12.925514961}

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