16z^2+z-2=0

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Solution for 16z^2+z-2=0 equation:


Simplifying
16z2 + z + -2 = 0

Reorder the terms:
-2 + z + 16z2 = 0

Solving
-2 + z + 16z2 = 0

Solving for variable 'z'.

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

Divide each side by '16'.
-0.125 + 0.0625z + z2 = 0

Move the constant term to the right:

Add '0.125' to each side of the equation.
-0.125 + 0.0625z + 0.125 + z2 = 0 + 0.125

Reorder the terms:
-0.125 + 0.125 + 0.0625z + z2 = 0 + 0.125

Combine like terms: -0.125 + 0.125 = 0.000
0.000 + 0.0625z + z2 = 0 + 0.125
0.0625z + z2 = 0 + 0.125

Combine like terms: 0 + 0.125 = 0.125
0.0625z + z2 = 0.125

The z term is z.  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.
0.0625z + 0.25 + z2 = 0.125 + 0.25

Reorder the terms:
0.25 + 0.0625z + z2 = 0.125 + 0.25

Combine like terms: 0.125 + 0.25 = 0.375
0.25 + 0.0625z + z2 = 0.375

Factor a perfect square on the left side:
(z + 0.5)(z + 0.5) = 0.375

Calculate the square root of the right side: 0.612372436

Break this problem into two subproblems by setting 
(z + 0.5) equal to 0.612372436 and -0.612372436.

Subproblem 1

z + 0.5 = 0.612372436 Simplifying z + 0.5 = 0.612372436 Reorder the terms: 0.5 + z = 0.612372436 Solving 0.5 + z = 0.612372436 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + z = 0.612372436 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + z = 0.612372436 + -0.5 z = 0.612372436 + -0.5 Combine like terms: 0.612372436 + -0.5 = 0.112372436 z = 0.112372436 Simplifying z = 0.112372436

Subproblem 2

z + 0.5 = -0.612372436 Simplifying z + 0.5 = -0.612372436 Reorder the terms: 0.5 + z = -0.612372436 Solving 0.5 + z = -0.612372436 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + z = -0.612372436 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + z = -0.612372436 + -0.5 z = -0.612372436 + -0.5 Combine like terms: -0.612372436 + -0.5 = -1.112372436 z = -1.112372436 Simplifying z = -1.112372436

Solution

The solution to the problem is based on the solutions from the subproblems. z = {0.112372436, -1.112372436}

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