5x^2+50x+28=0

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Solution for 5x^2+50x+28=0 equation:


Simplifying
5x2 + 50x + 28 = 0

Reorder the terms:
28 + 50x + 5x2 = 0

Solving
28 + 50x + 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'.
5.6 + 10x + x2 = 0

Move the constant term to the right:

Add '-5.6' to each side of the equation.
5.6 + 10x + -5.6 + x2 = 0 + -5.6

Reorder the terms:
5.6 + -5.6 + 10x + x2 = 0 + -5.6

Combine like terms: 5.6 + -5.6 = 0.0
0.0 + 10x + x2 = 0 + -5.6
10x + x2 = 0 + -5.6

Combine like terms: 0 + -5.6 = -5.6
10x + x2 = -5.6

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = -5.6 + 25

Reorder the terms:
25 + 10x + x2 = -5.6 + 25

Combine like terms: -5.6 + 25 = 19.4
25 + 10x + x2 = 19.4

Factor a perfect square on the left side:
(x + 5)(x + 5) = 19.4

Calculate the square root of the right side: 4.404543109

Break this problem into two subproblems by setting 
(x + 5) equal to 4.404543109 and -4.404543109.

Subproblem 1

x + 5 = 4.404543109 Simplifying x + 5 = 4.404543109 Reorder the terms: 5 + x = 4.404543109 Solving 5 + x = 4.404543109 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 4.404543109 + -5 Combine like terms: 5 + -5 = 0 0 + x = 4.404543109 + -5 x = 4.404543109 + -5 Combine like terms: 4.404543109 + -5 = -0.595456891 x = -0.595456891 Simplifying x = -0.595456891

Subproblem 2

x + 5 = -4.404543109 Simplifying x + 5 = -4.404543109 Reorder the terms: 5 + x = -4.404543109 Solving 5 + x = -4.404543109 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -4.404543109 + -5 Combine like terms: 5 + -5 = 0 0 + x = -4.404543109 + -5 x = -4.404543109 + -5 Combine like terms: -4.404543109 + -5 = -9.404543109 x = -9.404543109 Simplifying x = -9.404543109

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.595456891, -9.404543109}

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