9z^2-36z+29=0

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Solution for 9z^2-36z+29=0 equation:


Simplifying
9z2 + -36z + 29 = 0

Reorder the terms:
29 + -36z + 9z2 = 0

Solving
29 + -36z + 9z2 = 0

Solving for variable 'z'.

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

Divide each side by '9'.
3.222222222 + -4z + z2 = 0

Move the constant term to the right:

Add '-3.222222222' to each side of the equation.
3.222222222 + -4z + -3.222222222 + z2 = 0 + -3.222222222

Reorder the terms:
3.222222222 + -3.222222222 + -4z + z2 = 0 + -3.222222222

Combine like terms: 3.222222222 + -3.222222222 = 0.000000000
0.000000000 + -4z + z2 = 0 + -3.222222222
-4z + z2 = 0 + -3.222222222

Combine like terms: 0 + -3.222222222 = -3.222222222
-4z + z2 = -3.222222222

The z term is -4z.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4z + 4 + z2 = -3.222222222 + 4

Reorder the terms:
4 + -4z + z2 = -3.222222222 + 4

Combine like terms: -3.222222222 + 4 = 0.777777778
4 + -4z + z2 = 0.777777778

Factor a perfect square on the left side:
(z + -2)(z + -2) = 0.777777778

Calculate the square root of the right side: 0.881917104

Break this problem into two subproblems by setting 
(z + -2) equal to 0.881917104 and -0.881917104.

Subproblem 1

z + -2 = 0.881917104 Simplifying z + -2 = 0.881917104 Reorder the terms: -2 + z = 0.881917104 Solving -2 + z = 0.881917104 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + z = 0.881917104 + 2 Combine like terms: -2 + 2 = 0 0 + z = 0.881917104 + 2 z = 0.881917104 + 2 Combine like terms: 0.881917104 + 2 = 2.881917104 z = 2.881917104 Simplifying z = 2.881917104

Subproblem 2

z + -2 = -0.881917104 Simplifying z + -2 = -0.881917104 Reorder the terms: -2 + z = -0.881917104 Solving -2 + z = -0.881917104 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + z = -0.881917104 + 2 Combine like terms: -2 + 2 = 0 0 + z = -0.881917104 + 2 z = -0.881917104 + 2 Combine like terms: -0.881917104 + 2 = 1.118082896 z = 1.118082896 Simplifying z = 1.118082896

Solution

The solution to the problem is based on the solutions from the subproblems. z = {2.881917104, 1.118082896}

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