5x^2+5x-144=0

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Solution for 5x^2+5x-144=0 equation:


Simplifying
5x2 + 5x + -144 = 0

Reorder the terms:
-144 + 5x + 5x2 = 0

Solving
-144 + 5x + 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'.
-28.8 + x + x2 = 0

Move the constant term to the right:

Add '28.8' to each side of the equation.
-28.8 + x + 28.8 + x2 = 0 + 28.8

Reorder the terms:
-28.8 + 28.8 + x + x2 = 0 + 28.8

Combine like terms: -28.8 + 28.8 = 0.0
0.0 + x + x2 = 0 + 28.8
x + x2 = 0 + 28.8

Combine like terms: 0 + 28.8 = 28.8
x + x2 = 28.8

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

Add '0.25' to each side of the equation.
 + 0.25 + x2 = 28.8 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 28.8 + 0.25

Combine like terms: 28.8 + 0.25 = 29.05
1.25 + x2 = 29.05

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 29.05

Calculate the square root of the right side: 5.389805191

Break this problem into two subproblems by setting 
(x + 0.5) equal to 5.389805191 and -5.389805191.

Subproblem 1

x + 0.5 = 5.389805191 Simplifying x + 0.5 = 5.389805191 Reorder the terms: 0.5 + x = 5.389805191 Solving 0.5 + x = 5.389805191 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 5.389805191 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 5.389805191 + -0.5 x = 5.389805191 + -0.5 Combine like terms: 5.389805191 + -0.5 = 4.889805191 x = 4.889805191 Simplifying x = 4.889805191

Subproblem 2

x + 0.5 = -5.389805191 Simplifying x + 0.5 = -5.389805191 Reorder the terms: 0.5 + x = -5.389805191 Solving 0.5 + x = -5.389805191 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -5.389805191 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -5.389805191 + -0.5 x = -5.389805191 + -0.5 Combine like terms: -5.389805191 + -0.5 = -5.889805191 x = -5.889805191 Simplifying x = -5.889805191

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.889805191, -5.889805191}

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