5x*5x+2x-1=0

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Solution for 5x*5x+2x-1=0 equation:


Simplifying
5x * 5x + 2x + -1 = 0

Reorder the terms for easier multiplication:
5 * 5x * x + 2x + -1 = 0

Multiply 5 * 5
25x * x + 2x + -1 = 0

Multiply x * x
25x2 + 2x + -1 = 0

Reorder the terms:
-1 + 2x + 25x2 = 0

Solving
-1 + 2x + 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'.
-0.04 + 0.08x + x2 = 0

Move the constant term to the right:

Add '0.04' to each side of the equation.
-0.04 + 0.08x + 0.04 + x2 = 0 + 0.04

Reorder the terms:
-0.04 + 0.04 + 0.08x + x2 = 0 + 0.04

Combine like terms: -0.04 + 0.04 = 0.00
0.00 + 0.08x + x2 = 0 + 0.04
0.08x + x2 = 0 + 0.04

Combine like terms: 0 + 0.04 = 0.04
0.08x + x2 = 0.04

The x term is 0.08x.  Take half its coefficient (0.04).
Square it (0.0016) and add it to both sides.

Add '0.0016' to each side of the equation.
0.08x + 0.0016 + x2 = 0.04 + 0.0016

Reorder the terms:
0.0016 + 0.08x + x2 = 0.04 + 0.0016

Combine like terms: 0.04 + 0.0016 = 0.0416
0.0016 + 0.08x + x2 = 0.0416

Factor a perfect square on the left side:
(x + 0.04)(x + 0.04) = 0.0416

Calculate the square root of the right side: 0.203960781

Break this problem into two subproblems by setting 
(x + 0.04) equal to 0.203960781 and -0.203960781.

Subproblem 1

x + 0.04 = 0.203960781 Simplifying x + 0.04 = 0.203960781 Reorder the terms: 0.04 + x = 0.203960781 Solving 0.04 + x = 0.203960781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.04' to each side of the equation. 0.04 + -0.04 + x = 0.203960781 + -0.04 Combine like terms: 0.04 + -0.04 = 0.00 0.00 + x = 0.203960781 + -0.04 x = 0.203960781 + -0.04 Combine like terms: 0.203960781 + -0.04 = 0.163960781 x = 0.163960781 Simplifying x = 0.163960781

Subproblem 2

x + 0.04 = -0.203960781 Simplifying x + 0.04 = -0.203960781 Reorder the terms: 0.04 + x = -0.203960781 Solving 0.04 + x = -0.203960781 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.04' to each side of the equation. 0.04 + -0.04 + x = -0.203960781 + -0.04 Combine like terms: 0.04 + -0.04 = 0.00 0.00 + x = -0.203960781 + -0.04 x = -0.203960781 + -0.04 Combine like terms: -0.203960781 + -0.04 = -0.243960781 x = -0.243960781 Simplifying x = -0.243960781

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.163960781, -0.243960781}

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