x^2-6.5x-3.5=0

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Solution for x^2-6.5x-3.5=0 equation: 


Simplifying
x2 + -6.5x + -3.5 = 0

Reorder the terms:
-3.5 + -6.5x + x2 = 0

Solving
-3.5 + -6.5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + -6.5x + 3.5 + x2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + -6.5x + x2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + -6.5x + x2 = 0 + 3.5
-6.5x + x2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
-6.5x + x2 = 3.5

The x term is -6.5x.  Take half its coefficient (-3.25).
Square it (10.5625) and add it to both sides.

Add '10.5625' to each side of the equation.
-6.5x + 10.5625 + x2 = 3.5 + 10.5625

Reorder the terms:
10.5625 + -6.5x + x2 = 3.5 + 10.5625

Combine like terms: 3.5 + 10.5625 = 14.0625
10.5625 + -6.5x + x2 = 14.0625

Factor a perfect square on the left side:
(x + -3.25)(x + -3.25) = 14.0625

Calculate the square root of the right side: 3.75

Break this problem into two subproblems by setting 
(x + -3.25) equal to 3.75 and -3.75.


Subproblem 1
x + -3.25 = 3.75

Simplifying
x + -3.25 = 3.75

Reorder the terms:
-3.25 + x = 3.75

Solving
-3.25 + x = 3.75

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3.25' to each side of the equation.
-3.25 + 3.25 + x = 3.75 + 3.25

Combine like terms: -3.25 + 3.25 = 0.00
0.00 + x = 3.75 + 3.25
x = 3.75 + 3.25

Combine like terms: 3.75 + 3.25 = 7
x = 7

Simplifying
x = 7


Subproblem 2
x + -3.25 = -3.75

Simplifying
x + -3.25 = -3.75

Reorder the terms:
-3.25 + x = -3.75

Solving
-3.25 + x = -3.75

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3.25' to each side of the equation.
-3.25 + 3.25 + x = -3.75 + 3.25

Combine like terms: -3.25 + 3.25 = 0.00
0.00 + x = -3.75 + 3.25
x = -3.75 + 3.25

Combine like terms: -3.75 + 3.25 = -0.5
x = -0.5

Simplifying
x = -0.5


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {7, -0.5}

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