5x^2+5x-288=0

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Solution for 5x^2+5x-288=0 equation:


Simplifying
5x2 + 5x + -288 = 0

Reorder the terms:
-288 + 5x + 5x2 = 0

Solving
-288 + 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'.
-57.6 + x + x2 = 0

Move the constant term to the right:

Add '57.6' to each side of the equation.
-57.6 + x + 57.6 + x2 = 0 + 57.6

Reorder the terms:
-57.6 + 57.6 + x + x2 = 0 + 57.6

Combine like terms: -57.6 + 57.6 = 0.0
0.0 + x + x2 = 0 + 57.6
x + x2 = 0 + 57.6

Combine like terms: 0 + 57.6 = 57.6
x + x2 = 57.6

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 = 57.6 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 57.6 + 0.25

Combine like terms: 57.6 + 0.25 = 57.85
1.25 + x2 = 57.85

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 57.85

Calculate the square root of the right side: 7.605918748

Break this problem into two subproblems by setting 
(x + 0.5) equal to 7.605918748 and -7.605918748.

Subproblem 1

x + 0.5 = 7.605918748 Simplifying x + 0.5 = 7.605918748 Reorder the terms: 0.5 + x = 7.605918748 Solving 0.5 + x = 7.605918748 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 = 7.605918748 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 7.605918748 + -0.5 x = 7.605918748 + -0.5 Combine like terms: 7.605918748 + -0.5 = 7.105918748 x = 7.105918748 Simplifying x = 7.105918748

Subproblem 2

x + 0.5 = -7.605918748 Simplifying x + 0.5 = -7.605918748 Reorder the terms: 0.5 + x = -7.605918748 Solving 0.5 + x = -7.605918748 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 = -7.605918748 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -7.605918748 + -0.5 x = -7.605918748 + -0.5 Combine like terms: -7.605918748 + -0.5 = -8.105918748 x = -8.105918748 Simplifying x = -8.105918748

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.105918748, -8.105918748}

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