25x^2+102x-36=0

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Solution for 25x^2+102x-36=0 equation:


Simplifying
25x2 + 102x + -36 = 0

Reorder the terms:
-36 + 102x + 25x2 = 0

Solving
-36 + 102x + 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'.
-1.44 + 4.08x + x2 = 0

Move the constant term to the right:

Add '1.44' to each side of the equation.
-1.44 + 4.08x + 1.44 + x2 = 0 + 1.44

Reorder the terms:
-1.44 + 1.44 + 4.08x + x2 = 0 + 1.44

Combine like terms: -1.44 + 1.44 = 0.00
0.00 + 4.08x + x2 = 0 + 1.44
4.08x + x2 = 0 + 1.44

Combine like terms: 0 + 1.44 = 1.44
4.08x + x2 = 1.44

The x term is 4.08x.  Take half its coefficient (2.04).
Square it (4.1616) and add it to both sides.

Add '4.1616' to each side of the equation.
4.08x + 4.1616 + x2 = 1.44 + 4.1616

Reorder the terms:
4.1616 + 4.08x + x2 = 1.44 + 4.1616

Combine like terms: 1.44 + 4.1616 = 5.6016
4.1616 + 4.08x + x2 = 5.6016

Factor a perfect square on the left side:
(x + 2.04)(x + 2.04) = 5.6016

Calculate the square root of the right side: 2.366769951

Break this problem into two subproblems by setting 
(x + 2.04) equal to 2.366769951 and -2.366769951.

Subproblem 1

x + 2.04 = 2.366769951 Simplifying x + 2.04 = 2.366769951 Reorder the terms: 2.04 + x = 2.366769951 Solving 2.04 + x = 2.366769951 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.04' to each side of the equation. 2.04 + -2.04 + x = 2.366769951 + -2.04 Combine like terms: 2.04 + -2.04 = 0.00 0.00 + x = 2.366769951 + -2.04 x = 2.366769951 + -2.04 Combine like terms: 2.366769951 + -2.04 = 0.326769951 x = 0.326769951 Simplifying x = 0.326769951

Subproblem 2

x + 2.04 = -2.366769951 Simplifying x + 2.04 = -2.366769951 Reorder the terms: 2.04 + x = -2.366769951 Solving 2.04 + x = -2.366769951 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.04' to each side of the equation. 2.04 + -2.04 + x = -2.366769951 + -2.04 Combine like terms: 2.04 + -2.04 = 0.00 0.00 + x = -2.366769951 + -2.04 x = -2.366769951 + -2.04 Combine like terms: -2.366769951 + -2.04 = -4.406769951 x = -4.406769951 Simplifying x = -4.406769951

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.326769951, -4.406769951}

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