(-3z+5+6z-9)3z-4=

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Solution for (-3z+5+6z-9)3z-4= equation:


Simplifying
(-3z + 5 + 6z + -9) * 3z + -4 = 0

Reorder the terms:
(5 + -9 + -3z + 6z) * 3z + -4 = 0

Combine like terms: 5 + -9 = -4
(-4 + -3z + 6z) * 3z + -4 = 0

Combine like terms: -3z + 6z = 3z
(-4 + 3z) * 3z + -4 = 0

Reorder the terms for easier multiplication:
3z(-4 + 3z) + -4 = 0
(-4 * 3z + 3z * 3z) + -4 = 0
(-12z + 9z2) + -4 = 0

Reorder the terms:
-4 + -12z + 9z2 = 0

Solving
-4 + -12z + 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'.
-0.4444444444 + -1.333333333z + z2 = 0

Move the constant term to the right:

Add '0.4444444444' to each side of the equation.
-0.4444444444 + -1.333333333z + 0.4444444444 + z2 = 0 + 0.4444444444

Reorder the terms:
-0.4444444444 + 0.4444444444 + -1.333333333z + z2 = 0 + 0.4444444444

Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000
0.0000000000 + -1.333333333z + z2 = 0 + 0.4444444444
-1.333333333z + z2 = 0 + 0.4444444444

Combine like terms: 0 + 0.4444444444 = 0.4444444444
-1.333333333z + z2 = 0.4444444444

The z term is -1.333333333z.  Take half its coefficient (-0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
-1.333333333z + 0.4444444442 + z2 = 0.4444444444 + 0.4444444442

Reorder the terms:
0.4444444442 + -1.333333333z + z2 = 0.4444444444 + 0.4444444442

Combine like terms: 0.4444444444 + 0.4444444442 = 0.8888888886
0.4444444442 + -1.333333333z + z2 = 0.8888888886

Factor a perfect square on the left side:
(z + -0.6666666665)(z + -0.6666666665) = 0.8888888886

Calculate the square root of the right side: 0.942809041

Break this problem into two subproblems by setting 
(z + -0.6666666665) equal to 0.942809041 and -0.942809041.

Subproblem 1

z + -0.6666666665 = 0.942809041 Simplifying z + -0.6666666665 = 0.942809041 Reorder the terms: -0.6666666665 + z = 0.942809041 Solving -0.6666666665 + z = 0.942809041 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + z = 0.942809041 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + z = 0.942809041 + 0.6666666665 z = 0.942809041 + 0.6666666665 Combine like terms: 0.942809041 + 0.6666666665 = 1.6094757075 z = 1.6094757075 Simplifying z = 1.6094757075

Subproblem 2

z + -0.6666666665 = -0.942809041 Simplifying z + -0.6666666665 = -0.942809041 Reorder the terms: -0.6666666665 + z = -0.942809041 Solving -0.6666666665 + z = -0.942809041 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '0.6666666665' to each side of the equation. -0.6666666665 + 0.6666666665 + z = -0.942809041 + 0.6666666665 Combine like terms: -0.6666666665 + 0.6666666665 = 0.0000000000 0.0000000000 + z = -0.942809041 + 0.6666666665 z = -0.942809041 + 0.6666666665 Combine like terms: -0.942809041 + 0.6666666665 = -0.2761423745 z = -0.2761423745 Simplifying z = -0.2761423745

Solution

The solution to the problem is based on the solutions from the subproblems. z = {1.6094757075, -0.2761423745}

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