5x^2-28x-44=0

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Solution for 5x^2-28x-44=0 equation:


Simplifying
5x2 + -28x + -44 = 0

Reorder the terms:
-44 + -28x + 5x2 = 0

Solving
-44 + -28x + 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'.
-8.8 + -5.6x + x2 = 0

Move the constant term to the right:

Add '8.8' to each side of the equation.
-8.8 + -5.6x + 8.8 + x2 = 0 + 8.8

Reorder the terms:
-8.8 + 8.8 + -5.6x + x2 = 0 + 8.8

Combine like terms: -8.8 + 8.8 = 0.0
0.0 + -5.6x + x2 = 0 + 8.8
-5.6x + x2 = 0 + 8.8

Combine like terms: 0 + 8.8 = 8.8
-5.6x + x2 = 8.8

The x term is -5.6x.  Take half its coefficient (-2.8).
Square it (7.84) and add it to both sides.

Add '7.84' to each side of the equation.
-5.6x + 7.84 + x2 = 8.8 + 7.84

Reorder the terms:
7.84 + -5.6x + x2 = 8.8 + 7.84

Combine like terms: 8.8 + 7.84 = 16.64
7.84 + -5.6x + x2 = 16.64

Factor a perfect square on the left side:
(x + -2.8)(x + -2.8) = 16.64

Calculate the square root of the right side: 4.079215611

Break this problem into two subproblems by setting 
(x + -2.8) equal to 4.079215611 and -4.079215611.

Subproblem 1

x + -2.8 = 4.079215611 Simplifying x + -2.8 = 4.079215611 Reorder the terms: -2.8 + x = 4.079215611 Solving -2.8 + x = 4.079215611 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.8' to each side of the equation. -2.8 + 2.8 + x = 4.079215611 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + x = 4.079215611 + 2.8 x = 4.079215611 + 2.8 Combine like terms: 4.079215611 + 2.8 = 6.879215611 x = 6.879215611 Simplifying x = 6.879215611

Subproblem 2

x + -2.8 = -4.079215611 Simplifying x + -2.8 = -4.079215611 Reorder the terms: -2.8 + x = -4.079215611 Solving -2.8 + x = -4.079215611 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.8' to each side of the equation. -2.8 + 2.8 + x = -4.079215611 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + x = -4.079215611 + 2.8 x = -4.079215611 + 2.8 Combine like terms: -4.079215611 + 2.8 = -1.279215611 x = -1.279215611 Simplifying x = -1.279215611

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.879215611, -1.279215611}

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