0.5x^2+1.5x-480=0

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Solution for 0.5x^2+1.5x-480=0 equation:


Simplifying
0.5x2 + 1.5x + -480 = 0

Reorder the terms:
-480 + 1.5x + 0.5x2 = 0

Solving
-480 + 1.5x + 0.5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
0.5 the coefficient of the squared term: 

Divide each side by '0.5'.
-960 + 3x + x2 = 0

Move the constant term to the right:

Add '960' to each side of the equation.
-960 + 3x + 960 + x2 = 0 + 960

Reorder the terms:
-960 + 960 + 3x + x2 = 0 + 960

Combine like terms: -960 + 960 = 0
0 + 3x + x2 = 0 + 960
3x + x2 = 0 + 960

Combine like terms: 0 + 960 = 960
3x + x2 = 960

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 960 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 960 + 2.25

Combine like terms: 960 + 2.25 = 962.25
2.25 + 3x + x2 = 962.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 962.25

Calculate the square root of the right side: 31.020154738

Break this problem into two subproblems by setting 
(x + 1.5) equal to 31.020154738 and -31.020154738.

Subproblem 1

x + 1.5 = 31.020154738 Simplifying x + 1.5 = 31.020154738 Reorder the terms: 1.5 + x = 31.020154738 Solving 1.5 + x = 31.020154738 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 31.020154738 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 31.020154738 + -1.5 x = 31.020154738 + -1.5 Combine like terms: 31.020154738 + -1.5 = 29.520154738 x = 29.520154738 Simplifying x = 29.520154738

Subproblem 2

x + 1.5 = -31.020154738 Simplifying x + 1.5 = -31.020154738 Reorder the terms: 1.5 + x = -31.020154738 Solving 1.5 + x = -31.020154738 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -31.020154738 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -31.020154738 + -1.5 x = -31.020154738 + -1.5 Combine like terms: -31.020154738 + -1.5 = -32.520154738 x = -32.520154738 Simplifying x = -32.520154738

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.520154738, -32.520154738}

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