6x^2+1.5x-13.5=0

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Solution for 6x^2+1.5x-13.5=0 equation:


Simplifying
6x2 + 1.5x + -13.5 = 0

Reorder the terms:
-13.5 + 1.5x + 6x2 = 0

Solving
-13.5 + 1.5x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-2.25 + 0.25x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + 0.25x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + 0.25x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + 0.25x + x2 = 0 + 2.25
0.25x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
0.25x + x2 = 2.25

The x term is 0.25x.  Take half its coefficient (0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
0.25x + 0.015625 + x2 = 2.25 + 0.015625

Reorder the terms:
0.015625 + 0.25x + x2 = 2.25 + 0.015625

Combine like terms: 2.25 + 0.015625 = 2.265625
0.015625 + 0.25x + x2 = 2.265625

Factor a perfect square on the left side:
(x + 0.125)(x + 0.125) = 2.265625

Calculate the square root of the right side: 1.505199322

Break this problem into two subproblems by setting 
(x + 0.125) equal to 1.505199322 and -1.505199322.

Subproblem 1

x + 0.125 = 1.505199322 Simplifying x + 0.125 = 1.505199322 Reorder the terms: 0.125 + x = 1.505199322 Solving 0.125 + x = 1.505199322 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = 1.505199322 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = 1.505199322 + -0.125 x = 1.505199322 + -0.125 Combine like terms: 1.505199322 + -0.125 = 1.380199322 x = 1.380199322 Simplifying x = 1.380199322

Subproblem 2

x + 0.125 = -1.505199322 Simplifying x + 0.125 = -1.505199322 Reorder the terms: 0.125 + x = -1.505199322 Solving 0.125 + x = -1.505199322 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = -1.505199322 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = -1.505199322 + -0.125 x = -1.505199322 + -0.125 Combine like terms: -1.505199322 + -0.125 = -1.630199322 x = -1.630199322 Simplifying x = -1.630199322

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.380199322, -1.630199322}

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