0.2x^2+10x+5=0

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Solution for 0.2x^2+10x+5=0 equation:


Simplifying
0.2x2 + 10x + 5 = 0

Reorder the terms:
5 + 10x + 0.2x2 = 0

Solving
5 + 10x + 0.2x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.2'.
25 + 50x + x2 = 0

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + 50x + -25 + x2 = 0 + -25

Reorder the terms:
25 + -25 + 50x + x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + 50x + x2 = 0 + -25
50x + x2 = 0 + -25

Combine like terms: 0 + -25 = -25
50x + x2 = -25

The x term is 50x.  Take half its coefficient (25).
Square it (625) and add it to both sides.

Add '625' to each side of the equation.
50x + 625 + x2 = -25 + 625

Reorder the terms:
625 + 50x + x2 = -25 + 625

Combine like terms: -25 + 625 = 600
625 + 50x + x2 = 600

Factor a perfect square on the left side:
(x + 25)(x + 25) = 600

Calculate the square root of the right side: 24.494897428

Break this problem into two subproblems by setting 
(x + 25) equal to 24.494897428 and -24.494897428.

Subproblem 1

x + 25 = 24.494897428 Simplifying x + 25 = 24.494897428 Reorder the terms: 25 + x = 24.494897428 Solving 25 + x = 24.494897428 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-25' to each side of the equation. 25 + -25 + x = 24.494897428 + -25 Combine like terms: 25 + -25 = 0 0 + x = 24.494897428 + -25 x = 24.494897428 + -25 Combine like terms: 24.494897428 + -25 = -0.505102572 x = -0.505102572 Simplifying x = -0.505102572

Subproblem 2

x + 25 = -24.494897428 Simplifying x + 25 = -24.494897428 Reorder the terms: 25 + x = -24.494897428 Solving 25 + x = -24.494897428 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-25' to each side of the equation. 25 + -25 + x = -24.494897428 + -25 Combine like terms: 25 + -25 = 0 0 + x = -24.494897428 + -25 x = -24.494897428 + -25 Combine like terms: -24.494897428 + -25 = -49.494897428 x = -49.494897428 Simplifying x = -49.494897428

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.505102572, -49.494897428}

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