25x^2+16x-2=0

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Solution for 25x^2+16x-2=0 equation:


Simplifying
25x2 + 16x + -2 = 0

Reorder the terms:
-2 + 16x + 25x2 = 0

Solving
-2 + 16x + 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 + 0.64x + x2 = 0

Move the constant term to the right:

Add '0.08' to each side of the equation.
-0.08 + 0.64x + 0.08 + x2 = 0 + 0.08

Reorder the terms:
-0.08 + 0.08 + 0.64x + x2 = 0 + 0.08

Combine like terms: -0.08 + 0.08 = 0.00
0.00 + 0.64x + x2 = 0 + 0.08
0.64x + x2 = 0 + 0.08

Combine like terms: 0 + 0.08 = 0.08
0.64x + x2 = 0.08

The x term is 0.64x.  Take half its coefficient (0.32).
Square it (0.1024) and add it to both sides.

Add '0.1024' to each side of the equation.
0.64x + 0.1024 + x2 = 0.08 + 0.1024

Reorder the terms:
0.1024 + 0.64x + x2 = 0.08 + 0.1024

Combine like terms: 0.08 + 0.1024 = 0.1824
0.1024 + 0.64x + x2 = 0.1824

Factor a perfect square on the left side:
(x + 0.32)(x + 0.32) = 0.1824

Calculate the square root of the right side: 0.42708313

Break this problem into two subproblems by setting 
(x + 0.32) equal to 0.42708313 and -0.42708313.

Subproblem 1

x + 0.32 = 0.42708313 Simplifying x + 0.32 = 0.42708313 Reorder the terms: 0.32 + x = 0.42708313 Solving 0.32 + x = 0.42708313 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.32' to each side of the equation. 0.32 + -0.32 + x = 0.42708313 + -0.32 Combine like terms: 0.32 + -0.32 = 0.00 0.00 + x = 0.42708313 + -0.32 x = 0.42708313 + -0.32 Combine like terms: 0.42708313 + -0.32 = 0.10708313 x = 0.10708313 Simplifying x = 0.10708313

Subproblem 2

x + 0.32 = -0.42708313 Simplifying x + 0.32 = -0.42708313 Reorder the terms: 0.32 + x = -0.42708313 Solving 0.32 + x = -0.42708313 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.32' to each side of the equation. 0.32 + -0.32 + x = -0.42708313 + -0.32 Combine like terms: 0.32 + -0.32 = 0.00 0.00 + x = -0.42708313 + -0.32 x = -0.42708313 + -0.32 Combine like terms: -0.42708313 + -0.32 = -0.74708313 x = -0.74708313 Simplifying x = -0.74708313

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.10708313, -0.74708313}

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