5X^2+20X+1=0

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Solution for 5X^2+20X+1=0 equation:


Simplifying
5X2 + 20X + 1 = 0

Reorder the terms:
1 + 20X + 5X2 = 0

Solving
1 + 20X + 5X2 = 0

Solving for variable 'X'.

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

Divide each side by '5'.
0.2 + 4X + X2 = 0

Move the constant term to the right:

Add '-0.2' to each side of the equation.
0.2 + 4X + -0.2 + X2 = 0 + -0.2

Reorder the terms:
0.2 + -0.2 + 4X + X2 = 0 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + 4X + X2 = 0 + -0.2
4X + X2 = 0 + -0.2

Combine like terms: 0 + -0.2 = -0.2
4X + X2 = -0.2

The X term is 4X.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4X + 4 + X2 = -0.2 + 4

Reorder the terms:
4 + 4X + X2 = -0.2 + 4

Combine like terms: -0.2 + 4 = 3.8
4 + 4X + X2 = 3.8

Factor a perfect square on the left side:
(X + 2)(X + 2) = 3.8

Calculate the square root of the right side: 1.949358869

Break this problem into two subproblems by setting 
(X + 2) equal to 1.949358869 and -1.949358869.

Subproblem 1

X + 2 = 1.949358869 Simplifying X + 2 = 1.949358869 Reorder the terms: 2 + X = 1.949358869 Solving 2 + X = 1.949358869 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + X = 1.949358869 + -2 Combine like terms: 2 + -2 = 0 0 + X = 1.949358869 + -2 X = 1.949358869 + -2 Combine like terms: 1.949358869 + -2 = -0.050641131 X = -0.050641131 Simplifying X = -0.050641131

Subproblem 2

X + 2 = -1.949358869 Simplifying X + 2 = -1.949358869 Reorder the terms: 2 + X = -1.949358869 Solving 2 + X = -1.949358869 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + X = -1.949358869 + -2 Combine like terms: 2 + -2 = 0 0 + X = -1.949358869 + -2 X = -1.949358869 + -2 Combine like terms: -1.949358869 + -2 = -3.949358869 X = -3.949358869 Simplifying X = -3.949358869

Solution

The solution to the problem is based on the solutions from the subproblems. X = {-0.050641131, -3.949358869}

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