5.5x^2+44x-160=0

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Solution for 5.5x^2+44x-160=0 equation:


Simplifying
5.5x2 + 44x + -160 = 0

Reorder the terms:
-160 + 44x + 5.5x2 = 0

Solving
-160 + 44x + 5.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5.5'.
-29.09090909 + 8x + x2 = 0

Move the constant term to the right:

Add '29.09090909' to each side of the equation.
-29.09090909 + 8x + 29.09090909 + x2 = 0 + 29.09090909

Reorder the terms:
-29.09090909 + 29.09090909 + 8x + x2 = 0 + 29.09090909

Combine like terms: -29.09090909 + 29.09090909 = 0.00000000
0.00000000 + 8x + x2 = 0 + 29.09090909
8x + x2 = 0 + 29.09090909

Combine like terms: 0 + 29.09090909 = 29.09090909
8x + x2 = 29.09090909

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = 29.09090909 + 16

Reorder the terms:
16 + 8x + x2 = 29.09090909 + 16

Combine like terms: 29.09090909 + 16 = 45.09090909
16 + 8x + x2 = 45.09090909

Factor a perfect square on the left side:
(x + 4)(x + 4) = 45.09090909

Calculate the square root of the right side: 6.714976477

Break this problem into two subproblems by setting 
(x + 4) equal to 6.714976477 and -6.714976477.

Subproblem 1

x + 4 = 6.714976477 Simplifying x + 4 = 6.714976477 Reorder the terms: 4 + x = 6.714976477 Solving 4 + x = 6.714976477 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 6.714976477 + -4 Combine like terms: 4 + -4 = 0 0 + x = 6.714976477 + -4 x = 6.714976477 + -4 Combine like terms: 6.714976477 + -4 = 2.714976477 x = 2.714976477 Simplifying x = 2.714976477

Subproblem 2

x + 4 = -6.714976477 Simplifying x + 4 = -6.714976477 Reorder the terms: 4 + x = -6.714976477 Solving 4 + x = -6.714976477 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -6.714976477 + -4 Combine like terms: 4 + -4 = 0 0 + x = -6.714976477 + -4 x = -6.714976477 + -4 Combine like terms: -6.714976477 + -4 = -10.714976477 x = -10.714976477 Simplifying x = -10.714976477

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.714976477, -10.714976477}

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