-20x^2+10x+1=0

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Solution for -20x^2+10x+1=0 equation:


Simplifying
-20x2 + 10x + 1 = 0

Reorder the terms:
1 + 10x + -20x2 = 0

Solving
1 + 10x + -20x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-20 the coefficient of the squared term: 

Divide each side by '-20'.
-0.05 + -0.5x + x2 = 0

Move the constant term to the right:

Add '0.05' to each side of the equation.
-0.05 + -0.5x + 0.05 + x2 = 0 + 0.05

Reorder the terms:
-0.05 + 0.05 + -0.5x + x2 = 0 + 0.05

Combine like terms: -0.05 + 0.05 = 0.00
0.00 + -0.5x + x2 = 0 + 0.05
-0.5x + x2 = 0 + 0.05

Combine like terms: 0 + 0.05 = 0.05
-0.5x + x2 = 0.05

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 0.05 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 0.05 + 0.0625

Combine like terms: 0.05 + 0.0625 = 0.1125
0.0625 + -0.5x + x2 = 0.1125

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 0.1125

Calculate the square root of the right side: 0.335410197

Break this problem into two subproblems by setting 
(x + -0.25) equal to 0.335410197 and -0.335410197.

Subproblem 1

x + -0.25 = 0.335410197 Simplifying x + -0.25 = 0.335410197 Reorder the terms: -0.25 + x = 0.335410197 Solving -0.25 + x = 0.335410197 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 0.335410197 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 0.335410197 + 0.25 x = 0.335410197 + 0.25 Combine like terms: 0.335410197 + 0.25 = 0.585410197 x = 0.585410197 Simplifying x = 0.585410197

Subproblem 2

x + -0.25 = -0.335410197 Simplifying x + -0.25 = -0.335410197 Reorder the terms: -0.25 + x = -0.335410197 Solving -0.25 + x = -0.335410197 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -0.335410197 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -0.335410197 + 0.25 x = -0.335410197 + 0.25 Combine like terms: -0.335410197 + 0.25 = -0.085410197 x = -0.085410197 Simplifying x = -0.085410197

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.585410197, -0.085410197}

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