.2x^2+24x-720=0

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Solution for .2x^2+24x-720=0 equation:


Simplifying
0.2x2 + 24x + -720 = 0

Reorder the terms:
-720 + 24x + 0.2x2 = 0

Solving
-720 + 24x + 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'.
-3600 + 120x + x2 = 0

Move the constant term to the right:

Add '3600' to each side of the equation.
-3600 + 120x + 3600 + x2 = 0 + 3600

Reorder the terms:
-3600 + 3600 + 120x + x2 = 0 + 3600

Combine like terms: -3600 + 3600 = 0
0 + 120x + x2 = 0 + 3600
120x + x2 = 0 + 3600

Combine like terms: 0 + 3600 = 3600
120x + x2 = 3600

The x term is 120x.  Take half its coefficient (60).
Square it (3600) and add it to both sides.

Add '3600' to each side of the equation.
120x + 3600 + x2 = 3600 + 3600

Reorder the terms:
3600 + 120x + x2 = 3600 + 3600

Combine like terms: 3600 + 3600 = 7200
3600 + 120x + x2 = 7200

Factor a perfect square on the left side:
(x + 60)(x + 60) = 7200

Calculate the square root of the right side: 84.852813742

Break this problem into two subproblems by setting 
(x + 60) equal to 84.852813742 and -84.852813742.

Subproblem 1

x + 60 = 84.852813742 Simplifying x + 60 = 84.852813742 Reorder the terms: 60 + x = 84.852813742 Solving 60 + x = 84.852813742 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-60' to each side of the equation. 60 + -60 + x = 84.852813742 + -60 Combine like terms: 60 + -60 = 0 0 + x = 84.852813742 + -60 x = 84.852813742 + -60 Combine like terms: 84.852813742 + -60 = 24.852813742 x = 24.852813742 Simplifying x = 24.852813742

Subproblem 2

x + 60 = -84.852813742 Simplifying x + 60 = -84.852813742 Reorder the terms: 60 + x = -84.852813742 Solving 60 + x = -84.852813742 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-60' to each side of the equation. 60 + -60 + x = -84.852813742 + -60 Combine like terms: 60 + -60 = 0 0 + x = -84.852813742 + -60 x = -84.852813742 + -60 Combine like terms: -84.852813742 + -60 = -144.852813742 x = -144.852813742 Simplifying x = -144.852813742

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.852813742, -144.852813742}

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