44=x*(x+2.5)

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Solution for 44=x*(x+2.5) equation:


Simplifying
44 = x(x + 2.5)

Reorder the terms:
44 = x(2.5 + x)
44 = (2.5 * x + x * x)
44 = (2.5x + x2)

Solving
44 = 2.5x + x2

Solving for variable 'x'.

Reorder the terms:
44 + -2.5x + -1x2 = 2.5x + -2.5x + x2 + -1x2

Combine like terms: 2.5x + -2.5x = 0.0
44 + -2.5x + -1x2 = 0.0 + x2 + -1x2
44 + -2.5x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
44 + -2.5x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-44 + 2.5x + x2 = 0

Move the constant term to the right:

Add '44' to each side of the equation.
-44 + 2.5x + 44 + x2 = 0 + 44

Reorder the terms:
-44 + 44 + 2.5x + x2 = 0 + 44

Combine like terms: -44 + 44 = 0
0 + 2.5x + x2 = 0 + 44
2.5x + x2 = 0 + 44

Combine like terms: 0 + 44 = 44
2.5x + x2 = 44

The x term is 2.5x.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5x + 1.5625 + x2 = 44 + 1.5625

Reorder the terms:
1.5625 + 2.5x + x2 = 44 + 1.5625

Combine like terms: 44 + 1.5625 = 45.5625
1.5625 + 2.5x + x2 = 45.5625

Factor a perfect square on the left side:
(x + 1.25)(x + 1.25) = 45.5625

Calculate the square root of the right side: 6.75

Break this problem into two subproblems by setting 
(x + 1.25) equal to 6.75 and -6.75.

Subproblem 1

x + 1.25 = 6.75 Simplifying x + 1.25 = 6.75 Reorder the terms: 1.25 + x = 6.75 Solving 1.25 + x = 6.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = 6.75 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = 6.75 + -1.25 x = 6.75 + -1.25 Combine like terms: 6.75 + -1.25 = 5.5 x = 5.5 Simplifying x = 5.5

Subproblem 2

x + 1.25 = -6.75 Simplifying x + 1.25 = -6.75 Reorder the terms: 1.25 + x = -6.75 Solving 1.25 + x = -6.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + x = -6.75 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + x = -6.75 + -1.25 x = -6.75 + -1.25 Combine like terms: -6.75 + -1.25 = -8 x = -8 Simplifying x = -8

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.5, -8}

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