16z^2-96z+139=0

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Solution for 16z^2-96z+139=0 equation:


Simplifying
16z2 + -96z + 139 = 0

Reorder the terms:
139 + -96z + 16z2 = 0

Solving
139 + -96z + 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'.
8.6875 + -6z + z2 = 0

Move the constant term to the right:

Add '-8.6875' to each side of the equation.
8.6875 + -6z + -8.6875 + z2 = 0 + -8.6875

Reorder the terms:
8.6875 + -8.6875 + -6z + z2 = 0 + -8.6875

Combine like terms: 8.6875 + -8.6875 = 0.0000
0.0000 + -6z + z2 = 0 + -8.6875
-6z + z2 = 0 + -8.6875

Combine like terms: 0 + -8.6875 = -8.6875
-6z + z2 = -8.6875

The z term is -6z.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6z + 9 + z2 = -8.6875 + 9

Reorder the terms:
9 + -6z + z2 = -8.6875 + 9

Combine like terms: -8.6875 + 9 = 0.3125
9 + -6z + z2 = 0.3125

Factor a perfect square on the left side:
(z + -3)(z + -3) = 0.3125

Calculate the square root of the right side: 0.559016994

Break this problem into two subproblems by setting 
(z + -3) equal to 0.559016994 and -0.559016994.

Subproblem 1

z + -3 = 0.559016994 Simplifying z + -3 = 0.559016994 Reorder the terms: -3 + z = 0.559016994 Solving -3 + z = 0.559016994 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + z = 0.559016994 + 3 Combine like terms: -3 + 3 = 0 0 + z = 0.559016994 + 3 z = 0.559016994 + 3 Combine like terms: 0.559016994 + 3 = 3.559016994 z = 3.559016994 Simplifying z = 3.559016994

Subproblem 2

z + -3 = -0.559016994 Simplifying z + -3 = -0.559016994 Reorder the terms: -3 + z = -0.559016994 Solving -3 + z = -0.559016994 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + z = -0.559016994 + 3 Combine like terms: -3 + 3 = 0 0 + z = -0.559016994 + 3 z = -0.559016994 + 3 Combine like terms: -0.559016994 + 3 = 2.440983006 z = 2.440983006 Simplifying z = 2.440983006

Solution

The solution to the problem is based on the solutions from the subproblems. z = {3.559016994, 2.440983006}

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