25x^2-130x+9=0

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Solution for 25x^2-130x+9=0 equation:


Simplifying
25x2 + -130x + 9 = 0

Reorder the terms:
9 + -130x + 25x2 = 0

Solving
9 + -130x + 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'.
0.36 + -5.2x + x2 = 0

Move the constant term to the right:

Add '-0.36' to each side of the equation.
0.36 + -5.2x + -0.36 + x2 = 0 + -0.36

Reorder the terms:
0.36 + -0.36 + -5.2x + x2 = 0 + -0.36

Combine like terms: 0.36 + -0.36 = 0.00
0.00 + -5.2x + x2 = 0 + -0.36
-5.2x + x2 = 0 + -0.36

Combine like terms: 0 + -0.36 = -0.36
-5.2x + x2 = -0.36

The x term is -5.2x.  Take half its coefficient (-2.6).
Square it (6.76) and add it to both sides.

Add '6.76' to each side of the equation.
-5.2x + 6.76 + x2 = -0.36 + 6.76

Reorder the terms:
6.76 + -5.2x + x2 = -0.36 + 6.76

Combine like terms: -0.36 + 6.76 = 6.4
6.76 + -5.2x + x2 = 6.4

Factor a perfect square on the left side:
(x + -2.6)(x + -2.6) = 6.4

Calculate the square root of the right side: 2.529822128

Break this problem into two subproblems by setting 
(x + -2.6) equal to 2.529822128 and -2.529822128.

Subproblem 1

x + -2.6 = 2.529822128 Simplifying x + -2.6 = 2.529822128 Reorder the terms: -2.6 + x = 2.529822128 Solving -2.6 + x = 2.529822128 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.6' to each side of the equation. -2.6 + 2.6 + x = 2.529822128 + 2.6 Combine like terms: -2.6 + 2.6 = 0.0 0.0 + x = 2.529822128 + 2.6 x = 2.529822128 + 2.6 Combine like terms: 2.529822128 + 2.6 = 5.129822128 x = 5.129822128 Simplifying x = 5.129822128

Subproblem 2

x + -2.6 = -2.529822128 Simplifying x + -2.6 = -2.529822128 Reorder the terms: -2.6 + x = -2.529822128 Solving -2.6 + x = -2.529822128 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.6' to each side of the equation. -2.6 + 2.6 + x = -2.529822128 + 2.6 Combine like terms: -2.6 + 2.6 = 0.0 0.0 + x = -2.529822128 + 2.6 x = -2.529822128 + 2.6 Combine like terms: -2.529822128 + 2.6 = 0.070177872 x = 0.070177872 Simplifying x = 0.070177872

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.129822128, 0.070177872}

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