5x^2+56x-480=0

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Solution for 5x^2+56x-480=0 equation:


Simplifying
5x2 + 56x + -480 = 0

Reorder the terms:
-480 + 56x + 5x2 = 0

Solving
-480 + 56x + 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'.
-96 + 11.2x + x2 = 0

Move the constant term to the right:

Add '96' to each side of the equation.
-96 + 11.2x + 96 + x2 = 0 + 96

Reorder the terms:
-96 + 96 + 11.2x + x2 = 0 + 96

Combine like terms: -96 + 96 = 0
0 + 11.2x + x2 = 0 + 96
11.2x + x2 = 0 + 96

Combine like terms: 0 + 96 = 96
11.2x + x2 = 96

The x term is 11.2x.  Take half its coefficient (5.6).
Square it (31.36) and add it to both sides.

Add '31.36' to each side of the equation.
11.2x + 31.36 + x2 = 96 + 31.36

Reorder the terms:
31.36 + 11.2x + x2 = 96 + 31.36

Combine like terms: 96 + 31.36 = 127.36
31.36 + 11.2x + x2 = 127.36

Factor a perfect square on the left side:
(x + 5.6)(x + 5.6) = 127.36

Calculate the square root of the right side: 11.285388784

Break this problem into two subproblems by setting 
(x + 5.6) equal to 11.285388784 and -11.285388784.

Subproblem 1

x + 5.6 = 11.285388784 Simplifying x + 5.6 = 11.285388784 Reorder the terms: 5.6 + x = 11.285388784 Solving 5.6 + x = 11.285388784 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.6' to each side of the equation. 5.6 + -5.6 + x = 11.285388784 + -5.6 Combine like terms: 5.6 + -5.6 = 0.0 0.0 + x = 11.285388784 + -5.6 x = 11.285388784 + -5.6 Combine like terms: 11.285388784 + -5.6 = 5.685388784 x = 5.685388784 Simplifying x = 5.685388784

Subproblem 2

x + 5.6 = -11.285388784 Simplifying x + 5.6 = -11.285388784 Reorder the terms: 5.6 + x = -11.285388784 Solving 5.6 + x = -11.285388784 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.6' to each side of the equation. 5.6 + -5.6 + x = -11.285388784 + -5.6 Combine like terms: 5.6 + -5.6 = 0.0 0.0 + x = -11.285388784 + -5.6 x = -11.285388784 + -5.6 Combine like terms: -11.285388784 + -5.6 = -16.885388784 x = -16.885388784 Simplifying x = -16.885388784

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.685388784, -16.885388784}

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