25x^2-11x-2=0

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Solution for 25x^2-11x-2=0 equation:


Simplifying
25x2 + -11x + -2 = 0

Reorder the terms:
-2 + -11x + 25x2 = 0

Solving
-2 + -11x + 25x2 = 0

Solving for variable 'x'.

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

Divide each side by '25'.
-0.08 + -0.44x + x2 = 0

Move the constant term to the right:

Add '0.08' to each side of the equation.
-0.08 + -0.44x + 0.08 + x2 = 0 + 0.08

Reorder the terms:
-0.08 + 0.08 + -0.44x + x2 = 0 + 0.08

Combine like terms: -0.08 + 0.08 = 0.00
0.00 + -0.44x + x2 = 0 + 0.08
-0.44x + x2 = 0 + 0.08

Combine like terms: 0 + 0.08 = 0.08
-0.44x + x2 = 0.08

The x term is -0.44x.  Take half its coefficient (-0.22).
Square it (0.0484) and add it to both sides.

Add '0.0484' to each side of the equation.
-0.44x + 0.0484 + x2 = 0.08 + 0.0484

Reorder the terms:
0.0484 + -0.44x + x2 = 0.08 + 0.0484

Combine like terms: 0.08 + 0.0484 = 0.1284
0.0484 + -0.44x + x2 = 0.1284

Factor a perfect square on the left side:
(x + -0.22)(x + -0.22) = 0.1284

Calculate the square root of the right side: 0.358329457

Break this problem into two subproblems by setting 
(x + -0.22) equal to 0.358329457 and -0.358329457.

Subproblem 1

x + -0.22 = 0.358329457 Simplifying x + -0.22 = 0.358329457 Reorder the terms: -0.22 + x = 0.358329457 Solving -0.22 + x = 0.358329457 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.22' to each side of the equation. -0.22 + 0.22 + x = 0.358329457 + 0.22 Combine like terms: -0.22 + 0.22 = 0.00 0.00 + x = 0.358329457 + 0.22 x = 0.358329457 + 0.22 Combine like terms: 0.358329457 + 0.22 = 0.578329457 x = 0.578329457 Simplifying x = 0.578329457

Subproblem 2

x + -0.22 = -0.358329457 Simplifying x + -0.22 = -0.358329457 Reorder the terms: -0.22 + x = -0.358329457 Solving -0.22 + x = -0.358329457 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.22' to each side of the equation. -0.22 + 0.22 + x = -0.358329457 + 0.22 Combine like terms: -0.22 + 0.22 = 0.00 0.00 + x = -0.358329457 + 0.22 x = -0.358329457 + 0.22 Combine like terms: -0.358329457 + 0.22 = -0.138329457 x = -0.138329457 Simplifying x = -0.138329457

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.578329457, -0.138329457}

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