-(3z^2+4z)-(6z^2-2)=

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Solution for -(3z^2+4z)-(6z^2-2)= equation:


Simplifying
-1(3z2 + 4z) + -1(6z2 + -2) = 0

Reorder the terms:
-1(4z + 3z2) + -1(6z2 + -2) = 0
(4z * -1 + 3z2 * -1) + -1(6z2 + -2) = 0
(-4z + -3z2) + -1(6z2 + -2) = 0

Reorder the terms:
-4z + -3z2 + -1(-2 + 6z2) = 0
-4z + -3z2 + (-2 * -1 + 6z2 * -1) = 0
-4z + -3z2 + (2 + -6z2) = 0

Reorder the terms:
2 + -4z + -3z2 + -6z2 = 0

Combine like terms: -3z2 + -6z2 = -9z2
2 + -4z + -9z2 = 0

Solving
2 + -4z + -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'.
-0.2222222222 + 0.4444444444z + z2 = 0

Move the constant term to the right:

Add '0.2222222222' to each side of the equation.
-0.2222222222 + 0.4444444444z + 0.2222222222 + z2 = 0 + 0.2222222222

Reorder the terms:
-0.2222222222 + 0.2222222222 + 0.4444444444z + z2 = 0 + 0.2222222222

Combine like terms: -0.2222222222 + 0.2222222222 = 0.0000000000
0.0000000000 + 0.4444444444z + z2 = 0 + 0.2222222222
0.4444444444z + z2 = 0 + 0.2222222222

Combine like terms: 0 + 0.2222222222 = 0.2222222222
0.4444444444z + z2 = 0.2222222222

The z term is 0.4444444444z.  Take half its coefficient (0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
0.4444444444z + 0.04938271604 + z2 = 0.2222222222 + 0.04938271604

Reorder the terms:
0.04938271604 + 0.4444444444z + z2 = 0.2222222222 + 0.04938271604

Combine like terms: 0.2222222222 + 0.04938271604 = 0.27160493824
0.04938271604 + 0.4444444444z + z2 = 0.27160493824

Factor a perfect square on the left side:
(z + 0.2222222222)(z + 0.2222222222) = 0.27160493824

Calculate the square root of the right side: 0.521157307

Break this problem into two subproblems by setting 
(z + 0.2222222222) equal to 0.521157307 and -0.521157307.

Subproblem 1

z + 0.2222222222 = 0.521157307 Simplifying z + 0.2222222222 = 0.521157307 Reorder the terms: 0.2222222222 + z = 0.521157307 Solving 0.2222222222 + z = 0.521157307 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + z = 0.521157307 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + z = 0.521157307 + -0.2222222222 z = 0.521157307 + -0.2222222222 Combine like terms: 0.521157307 + -0.2222222222 = 0.2989350848 z = 0.2989350848 Simplifying z = 0.2989350848

Subproblem 2

z + 0.2222222222 = -0.521157307 Simplifying z + 0.2222222222 = -0.521157307 Reorder the terms: 0.2222222222 + z = -0.521157307 Solving 0.2222222222 + z = -0.521157307 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + z = -0.521157307 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + z = -0.521157307 + -0.2222222222 z = -0.521157307 + -0.2222222222 Combine like terms: -0.521157307 + -0.2222222222 = -0.7433795292 z = -0.7433795292 Simplifying z = -0.7433795292

Solution

The solution to the problem is based on the solutions from the subproblems. z = {0.2989350848, -0.7433795292}

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