5x^2-16x-384=0

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Solution for 5x^2-16x-384=0 equation:


Simplifying
5x2 + -16x + -384 = 0

Reorder the terms:
-384 + -16x + 5x2 = 0

Solving
-384 + -16x + 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 + -3.2x + x2 = 0

Move the constant term to the right:

Add '76.8' to each side of the equation.
-76.8 + -3.2x + 76.8 + x2 = 0 + 76.8

Reorder the terms:
-76.8 + 76.8 + -3.2x + x2 = 0 + 76.8

Combine like terms: -76.8 + 76.8 = 0.0
0.0 + -3.2x + x2 = 0 + 76.8
-3.2x + x2 = 0 + 76.8

Combine like terms: 0 + 76.8 = 76.8
-3.2x + x2 = 76.8

The x term is -3.2x.  Take half its coefficient (-1.6).
Square it (2.56) and add it to both sides.

Add '2.56' to each side of the equation.
-3.2x + 2.56 + x2 = 76.8 + 2.56

Reorder the terms:
2.56 + -3.2x + x2 = 76.8 + 2.56

Combine like terms: 76.8 + 2.56 = 79.36
2.56 + -3.2x + x2 = 79.36

Factor a perfect square on the left side:
(x + -1.6)(x + -1.6) = 79.36

Calculate the square root of the right side: 8.908422981

Break this problem into two subproblems by setting 
(x + -1.6) equal to 8.908422981 and -8.908422981.

Subproblem 1

x + -1.6 = 8.908422981 Simplifying x + -1.6 = 8.908422981 Reorder the terms: -1.6 + x = 8.908422981 Solving -1.6 + x = 8.908422981 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = 8.908422981 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = 8.908422981 + 1.6 x = 8.908422981 + 1.6 Combine like terms: 8.908422981 + 1.6 = 10.508422981 x = 10.508422981 Simplifying x = 10.508422981

Subproblem 2

x + -1.6 = -8.908422981 Simplifying x + -1.6 = -8.908422981 Reorder the terms: -1.6 + x = -8.908422981 Solving -1.6 + x = -8.908422981 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = -8.908422981 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = -8.908422981 + 1.6 x = -8.908422981 + 1.6 Combine like terms: -8.908422981 + 1.6 = -7.308422981 x = -7.308422981 Simplifying x = -7.308422981

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.508422981, -7.308422981}

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