36x^2+x-25=0

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


Simplifying
36x2 + x + -25 = 0

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

Solving
-25 + x + 36x2 = 0

Solving for variable 'x'.

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

Divide each side by '36'.
-0.6944444444 + 0.02777777778x + x2 = 0

Move the constant term to the right:

Add '0.6944444444' to each side of the equation.
-0.6944444444 + 0.02777777778x + 0.6944444444 + x2 = 0 + 0.6944444444

Reorder the terms:
-0.6944444444 + 0.6944444444 + 0.02777777778x + x2 = 0 + 0.6944444444

Combine like terms: -0.6944444444 + 0.6944444444 = 0.0000000000
0.0000000000 + 0.02777777778x + x2 = 0 + 0.6944444444
0.02777777778x + x2 = 0 + 0.6944444444

Combine like terms: 0 + 0.6944444444 = 0.6944444444
0.02777777778x + x2 = 0.6944444444

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.02777777778x + 0.25 + x2 = 0.6944444444 + 0.25

Reorder the terms:
0.25 + 0.02777777778x + x2 = 0.6944444444 + 0.25

Combine like terms: 0.6944444444 + 0.25 = 0.9444444444
0.25 + 0.02777777778x + x2 = 0.9444444444

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.9444444444

Calculate the square root of the right side: 0.971825316

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.971825316 and -0.971825316.

Subproblem 1

x + 0.5 = 0.971825316 Simplifying x + 0.5 = 0.971825316 Reorder the terms: 0.5 + x = 0.971825316 Solving 0.5 + x = 0.971825316 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.971825316 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.971825316 + -0.5 x = 0.971825316 + -0.5 Combine like terms: 0.971825316 + -0.5 = 0.471825316 x = 0.471825316 Simplifying x = 0.471825316

Subproblem 2

x + 0.5 = -0.971825316 Simplifying x + 0.5 = -0.971825316 Reorder the terms: 0.5 + x = -0.971825316 Solving 0.5 + x = -0.971825316 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.971825316 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.971825316 + -0.5 x = -0.971825316 + -0.5 Combine like terms: -0.971825316 + -0.5 = -1.471825316 x = -1.471825316 Simplifying x = -1.471825316

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.471825316, -1.471825316}

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