-16x^2-19x+120=0

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Solution for -16x^2-19x+120=0 equation:


Simplifying
-16x2 + -19x + 120 = 0

Reorder the terms:
120 + -19x + -16x2 = 0

Solving
120 + -19x + -16x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-16 the coefficient of the squared term: 

Divide each side by '-16'.
-7.5 + 1.1875x + x2 = 0

Move the constant term to the right:

Add '7.5' to each side of the equation.
-7.5 + 1.1875x + 7.5 + x2 = 0 + 7.5

Reorder the terms:
-7.5 + 7.5 + 1.1875x + x2 = 0 + 7.5

Combine like terms: -7.5 + 7.5 = 0.0
0.0 + 1.1875x + x2 = 0 + 7.5
1.1875x + x2 = 0 + 7.5

Combine like terms: 0 + 7.5 = 7.5
1.1875x + x2 = 7.5

The x term is 1.1875x.  Take half its coefficient (0.59375).
Square it (0.3525390625) and add it to both sides.

Add '0.3525390625' to each side of the equation.
1.1875x + 0.3525390625 + x2 = 7.5 + 0.3525390625

Reorder the terms:
0.3525390625 + 1.1875x + x2 = 7.5 + 0.3525390625

Combine like terms: 7.5 + 0.3525390625 = 7.8525390625
0.3525390625 + 1.1875x + x2 = 7.8525390625

Factor a perfect square on the left side:
(x + 0.59375)(x + 0.59375) = 7.8525390625

Calculate the square root of the right side: 2.802238224

Break this problem into two subproblems by setting 
(x + 0.59375) equal to 2.802238224 and -2.802238224.

Subproblem 1

x + 0.59375 = 2.802238224 Simplifying x + 0.59375 = 2.802238224 Reorder the terms: 0.59375 + x = 2.802238224 Solving 0.59375 + x = 2.802238224 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.59375' to each side of the equation. 0.59375 + -0.59375 + x = 2.802238224 + -0.59375 Combine like terms: 0.59375 + -0.59375 = 0.00000 0.00000 + x = 2.802238224 + -0.59375 x = 2.802238224 + -0.59375 Combine like terms: 2.802238224 + -0.59375 = 2.208488224 x = 2.208488224 Simplifying x = 2.208488224

Subproblem 2

x + 0.59375 = -2.802238224 Simplifying x + 0.59375 = -2.802238224 Reorder the terms: 0.59375 + x = -2.802238224 Solving 0.59375 + x = -2.802238224 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.59375' to each side of the equation. 0.59375 + -0.59375 + x = -2.802238224 + -0.59375 Combine like terms: 0.59375 + -0.59375 = 0.00000 0.00000 + x = -2.802238224 + -0.59375 x = -2.802238224 + -0.59375 Combine like terms: -2.802238224 + -0.59375 = -3.395988224 x = -3.395988224 Simplifying x = -3.395988224

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.208488224, -3.395988224}

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