2x^2+25x-36=0

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Solution for 2x^2+25x-36=0 equation:


Simplifying
2x2 + 25x + -36 = 0

Reorder the terms:
-36 + 25x + 2x2 = 0

Solving
-36 + 25x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-18 + 12.5x + x2 = 0

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + 12.5x + 18 + x2 = 0 + 18

Reorder the terms:
-18 + 18 + 12.5x + x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 12.5x + x2 = 0 + 18
12.5x + x2 = 0 + 18

Combine like terms: 0 + 18 = 18
12.5x + x2 = 18

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 = 18 + 39.0625

Reorder the terms:
39.0625 + 12.5x + x2 = 18 + 39.0625

Combine like terms: 18 + 39.0625 = 57.0625
39.0625 + 12.5x + x2 = 57.0625

Factor a perfect square on the left side:
(x + 6.25)(x + 6.25) = 57.0625

Calculate the square root of the right side: 7.553972465

Break this problem into two subproblems by setting 
(x + 6.25) equal to 7.553972465 and -7.553972465.

Subproblem 1

x + 6.25 = 7.553972465 Simplifying x + 6.25 = 7.553972465 Reorder the terms: 6.25 + x = 7.553972465 Solving 6.25 + x = 7.553972465 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 = 7.553972465 + -6.25 Combine like terms: 6.25 + -6.25 = 0.00 0.00 + x = 7.553972465 + -6.25 x = 7.553972465 + -6.25 Combine like terms: 7.553972465 + -6.25 = 1.303972465 x = 1.303972465 Simplifying x = 1.303972465

Subproblem 2

x + 6.25 = -7.553972465 Simplifying x + 6.25 = -7.553972465 Reorder the terms: 6.25 + x = -7.553972465 Solving 6.25 + x = -7.553972465 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 = -7.553972465 + -6.25 Combine like terms: 6.25 + -6.25 = 0.00 0.00 + x = -7.553972465 + -6.25 x = -7.553972465 + -6.25 Combine like terms: -7.553972465 + -6.25 = -13.803972465 x = -13.803972465 Simplifying x = -13.803972465

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.303972465, -13.803972465}

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