x^2-3.5x-1.5=0

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Solution for x^2-3.5x-1.5=0 equation: 


Simplifying
x2 + -3.5x + -1.5 = 0

Reorder the terms:
-1.5 + -3.5x + x2 = 0

Solving
-1.5 + -3.5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -3.5x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -3.5x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -3.5x + x2 = 0 + 1.5
-3.5x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-3.5x + x2 = 1.5

The x term is -3.5x.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5x + 3.0625 + x2 = 1.5 + 3.0625

Reorder the terms:
3.0625 + -3.5x + x2 = 1.5 + 3.0625

Combine like terms: 1.5 + 3.0625 = 4.5625
3.0625 + -3.5x + x2 = 4.5625

Factor a perfect square on the left side:
(x + -1.75)(x + -1.75) = 4.5625

Calculate the square root of the right side: 2.136000936

Break this problem into two subproblems by setting 
(x + -1.75) equal to 2.136000936 and -2.136000936.


Subproblem 1
x + -1.75 = 2.136000936

Simplifying
x + -1.75 = 2.136000936

Reorder the terms:
-1.75 + x = 2.136000936

Solving
-1.75 + x = 2.136000936

Solving for variable 'x'.

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

Add '1.75' to each side of the equation.
-1.75 + 1.75 + x = 2.136000936 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + x = 2.136000936 + 1.75
x = 2.136000936 + 1.75

Combine like terms: 2.136000936 + 1.75 = 3.886000936
x = 3.886000936

Simplifying
x = 3.886000936


Subproblem 2
x + -1.75 = -2.136000936

Simplifying
x + -1.75 = -2.136000936

Reorder the terms:
-1.75 + x = -2.136000936

Solving
-1.75 + x = -2.136000936

Solving for variable 'x'.

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

Add '1.75' to each side of the equation.
-1.75 + 1.75 + x = -2.136000936 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + x = -2.136000936 + 1.75
x = -2.136000936 + 1.75

Combine like terms: -2.136000936 + 1.75 = -0.386000936
x = -0.386000936

Simplifying
x = -0.386000936


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {3.886000936, -0.386000936}

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