5x^2+50x-156=0

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Solution for 5x^2+50x-156=0 equation:


Simplifying
5x2 + 50x + -156 = 0

Reorder the terms:
-156 + 50x + 5x2 = 0

Solving
-156 + 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'.
-31.2 + 10x + x2 = 0

Move the constant term to the right:

Add '31.2' to each side of the equation.
-31.2 + 10x + 31.2 + x2 = 0 + 31.2

Reorder the terms:
-31.2 + 31.2 + 10x + x2 = 0 + 31.2

Combine like terms: -31.2 + 31.2 = 0.0
0.0 + 10x + x2 = 0 + 31.2
10x + x2 = 0 + 31.2

Combine like terms: 0 + 31.2 = 31.2
10x + x2 = 31.2

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 = 31.2 + 25

Reorder the terms:
25 + 10x + x2 = 31.2 + 25

Combine like terms: 31.2 + 25 = 56.2
25 + 10x + x2 = 56.2

Factor a perfect square on the left side:
(x + 5)(x + 5) = 56.2

Calculate the square root of the right side: 7.496665926

Break this problem into two subproblems by setting 
(x + 5) equal to 7.496665926 and -7.496665926.

Subproblem 1

x + 5 = 7.496665926 Simplifying x + 5 = 7.496665926 Reorder the terms: 5 + x = 7.496665926 Solving 5 + x = 7.496665926 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 = 7.496665926 + -5 Combine like terms: 5 + -5 = 0 0 + x = 7.496665926 + -5 x = 7.496665926 + -5 Combine like terms: 7.496665926 + -5 = 2.496665926 x = 2.496665926 Simplifying x = 2.496665926

Subproblem 2

x + 5 = -7.496665926 Simplifying x + 5 = -7.496665926 Reorder the terms: 5 + x = -7.496665926 Solving 5 + x = -7.496665926 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 = -7.496665926 + -5 Combine like terms: 5 + -5 = 0 0 + x = -7.496665926 + -5 x = -7.496665926 + -5 Combine like terms: -7.496665926 + -5 = -12.496665926 x = -12.496665926 Simplifying x = -12.496665926

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.496665926, -12.496665926}

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