3x^2-3x-5=5

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Solution for 3x^2-3x-5=5 equation:


Simplifying
3x2 + -3x + -5 = 5

Reorder the terms:
-5 + -3x + 3x2 = 5

Solving
-5 + -3x + 3x2 = 5

Solving for variable 'x'.

Reorder the terms:
-5 + -5 + -3x + 3x2 = 5 + -5

Combine like terms: -5 + -5 = -10
-10 + -3x + 3x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-10 + -3x + 3x2 = 0

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

Divide each side by '3'.
-3.333333333 + -1x + x2 = 0

Move the constant term to the right:

Add '3.333333333' to each side of the equation.
-3.333333333 + -1x + 3.333333333 + x2 = 0 + 3.333333333

Reorder the terms:
-3.333333333 + 3.333333333 + -1x + x2 = 0 + 3.333333333

Combine like terms: -3.333333333 + 3.333333333 = 0.000000000
0.000000000 + -1x + x2 = 0 + 3.333333333
-1x + x2 = 0 + 3.333333333

Combine like terms: 0 + 3.333333333 = 3.333333333
-1x + x2 = 3.333333333

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 3.333333333 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 3.333333333 + 0.25

Combine like terms: 3.333333333 + 0.25 = 3.583333333
0.25 + -1x + x2 = 3.583333333

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 3.583333333

Calculate the square root of the right side: 1.892969449

Break this problem into two subproblems by setting 
(x + -0.5) equal to 1.892969449 and -1.892969449.

Subproblem 1

x + -0.5 = 1.892969449 Simplifying x + -0.5 = 1.892969449 Reorder the terms: -0.5 + x = 1.892969449 Solving -0.5 + x = 1.892969449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 1.892969449 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 1.892969449 + 0.5 x = 1.892969449 + 0.5 Combine like terms: 1.892969449 + 0.5 = 2.392969449 x = 2.392969449 Simplifying x = 2.392969449

Subproblem 2

x + -0.5 = -1.892969449 Simplifying x + -0.5 = -1.892969449 Reorder the terms: -0.5 + x = -1.892969449 Solving -0.5 + x = -1.892969449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -1.892969449 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -1.892969449 + 0.5 x = -1.892969449 + 0.5 Combine like terms: -1.892969449 + 0.5 = -1.392969449 x = -1.392969449 Simplifying x = -1.392969449

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.392969449, -1.392969449}

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