0=2x^2-3x-38

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Solution for 0=2x^2-3x-38 equation:


Simplifying
0 = 2x2 + -3x + -38

Reorder the terms:
0 = -38 + -3x + 2x2

Solving
0 = -38 + -3x + 2x2

Solving for variable 'x'.

Combine like terms: 0 + 38 = 38
38 + 3x + -2x2 = -38 + -3x + 2x2 + 38 + 3x + -2x2

Reorder the terms:
38 + 3x + -2x2 = -38 + 38 + -3x + 3x + 2x2 + -2x2

Combine like terms: -38 + 38 = 0
38 + 3x + -2x2 = 0 + -3x + 3x + 2x2 + -2x2
38 + 3x + -2x2 = -3x + 3x + 2x2 + -2x2

Combine like terms: -3x + 3x = 0
38 + 3x + -2x2 = 0 + 2x2 + -2x2
38 + 3x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
38 + 3x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-19 + -1.5x + x2 = 0

Move the constant term to the right:

Add '19' to each side of the equation.
-19 + -1.5x + 19 + x2 = 0 + 19

Reorder the terms:
-19 + 19 + -1.5x + x2 = 0 + 19

Combine like terms: -19 + 19 = 0
0 + -1.5x + x2 = 0 + 19
-1.5x + x2 = 0 + 19

Combine like terms: 0 + 19 = 19
-1.5x + x2 = 19

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 19 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 19 + 0.5625

Combine like terms: 19 + 0.5625 = 19.5625
0.5625 + -1.5x + x2 = 19.5625

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 19.5625

Calculate the square root of the right side: 4.422951503

Break this problem into two subproblems by setting 
(x + -0.75) equal to 4.422951503 and -4.422951503.

Subproblem 1

x + -0.75 = 4.422951503 Simplifying x + -0.75 = 4.422951503 Reorder the terms: -0.75 + x = 4.422951503 Solving -0.75 + x = 4.422951503 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 4.422951503 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 4.422951503 + 0.75 x = 4.422951503 + 0.75 Combine like terms: 4.422951503 + 0.75 = 5.172951503 x = 5.172951503 Simplifying x = 5.172951503

Subproblem 2

x + -0.75 = -4.422951503 Simplifying x + -0.75 = -4.422951503 Reorder the terms: -0.75 + x = -4.422951503 Solving -0.75 + x = -4.422951503 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -4.422951503 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -4.422951503 + 0.75 x = -4.422951503 + 0.75 Combine like terms: -4.422951503 + 0.75 = -3.672951503 x = -3.672951503 Simplifying x = -3.672951503

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.172951503, -3.672951503}

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