5x^2+x-384=0

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Solution for 5x^2+x-384=0 equation:


Simplifying
5x2 + x + -384 = 0

Reorder the terms:
-384 + x + 5x2 = 0

Solving
-384 + x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-76.8 + 0.2x + x2 = 0

Move the constant term to the right:

Add '76.8' to each side of the equation.
-76.8 + 0.2x + 76.8 + x2 = 0 + 76.8

Reorder the terms:
-76.8 + 76.8 + 0.2x + x2 = 0 + 76.8

Combine like terms: -76.8 + 76.8 = 0.0
0.0 + 0.2x + x2 = 0 + 76.8
0.2x + x2 = 0 + 76.8

Combine like terms: 0 + 76.8 = 76.8
0.2x + x2 = 76.8

The x term is x.  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.
0.2x + 0.25 + x2 = 76.8 + 0.25

Reorder the terms:
0.25 + 0.2x + x2 = 76.8 + 0.25

Combine like terms: 76.8 + 0.25 = 77.05
0.25 + 0.2x + x2 = 77.05

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 77.05

Calculate the square root of the right side: 8.777812939

Break this problem into two subproblems by setting 
(x + 0.5) equal to 8.777812939 and -8.777812939.

Subproblem 1

x + 0.5 = 8.777812939 Simplifying x + 0.5 = 8.777812939 Reorder the terms: 0.5 + x = 8.777812939 Solving 0.5 + x = 8.777812939 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 = 8.777812939 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 8.777812939 + -0.5 x = 8.777812939 + -0.5 Combine like terms: 8.777812939 + -0.5 = 8.277812939 x = 8.277812939 Simplifying x = 8.277812939

Subproblem 2

x + 0.5 = -8.777812939 Simplifying x + 0.5 = -8.777812939 Reorder the terms: 0.5 + x = -8.777812939 Solving 0.5 + x = -8.777812939 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 = -8.777812939 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -8.777812939 + -0.5 x = -8.777812939 + -0.5 Combine like terms: -8.777812939 + -0.5 = -9.277812939 x = -9.277812939 Simplifying x = -9.277812939

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.277812939, -9.277812939}

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