3z^2-3z-1=2z^2-z+3

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Solution for 3z^2-3z-1=2z^2-z+3 equation:


Simplifying
3z2 + -3z + -1 = 2z2 + -1z + 3

Reorder the terms:
-1 + -3z + 3z2 = 2z2 + -1z + 3

Reorder the terms:
-1 + -3z + 3z2 = 3 + -1z + 2z2

Solving
-1 + -3z + 3z2 = 3 + -1z + 2z2

Solving for variable 'z'.

Reorder the terms:
-1 + -3 + -3z + z + 3z2 + -2z2 = 3 + -1z + 2z2 + -3 + z + -2z2

Combine like terms: -1 + -3 = -4
-4 + -3z + z + 3z2 + -2z2 = 3 + -1z + 2z2 + -3 + z + -2z2

Combine like terms: -3z + z = -2z
-4 + -2z + 3z2 + -2z2 = 3 + -1z + 2z2 + -3 + z + -2z2

Combine like terms: 3z2 + -2z2 = 1z2
-4 + -2z + 1z2 = 3 + -1z + 2z2 + -3 + z + -2z2

Reorder the terms:
-4 + -2z + 1z2 = 3 + -3 + -1z + z + 2z2 + -2z2

Combine like terms: 3 + -3 = 0
-4 + -2z + 1z2 = 0 + -1z + z + 2z2 + -2z2
-4 + -2z + 1z2 = -1z + z + 2z2 + -2z2

Combine like terms: -1z + z = 0
-4 + -2z + 1z2 = 0 + 2z2 + -2z2
-4 + -2z + 1z2 = 2z2 + -2z2

Combine like terms: 2z2 + -2z2 = 0
-4 + -2z + 1z2 = 0

Begin completing the square.

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -2z + 4 + z2 = 0 + 4

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

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

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

The z term is -2z.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2z + 1 + z2 = 4 + 1

Reorder the terms:
1 + -2z + z2 = 4 + 1

Combine like terms: 4 + 1 = 5
1 + -2z + z2 = 5

Factor a perfect square on the left side:
(z + -1)(z + -1) = 5

Calculate the square root of the right side: 2.236067978

Break this problem into two subproblems by setting 
(z + -1) equal to 2.236067978 and -2.236067978.

Subproblem 1

z + -1 = 2.236067978 Simplifying z + -1 = 2.236067978 Reorder the terms: -1 + z = 2.236067978 Solving -1 + z = 2.236067978 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + z = 2.236067978 + 1 Combine like terms: -1 + 1 = 0 0 + z = 2.236067978 + 1 z = 2.236067978 + 1 Combine like terms: 2.236067978 + 1 = 3.236067978 z = 3.236067978 Simplifying z = 3.236067978

Subproblem 2

z + -1 = -2.236067978 Simplifying z + -1 = -2.236067978 Reorder the terms: -1 + z = -2.236067978 Solving -1 + z = -2.236067978 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + z = -2.236067978 + 1 Combine like terms: -1 + 1 = 0 0 + z = -2.236067978 + 1 z = -2.236067978 + 1 Combine like terms: -2.236067978 + 1 = -1.236067978 z = -1.236067978 Simplifying z = -1.236067978

Solution

The solution to the problem is based on the solutions from the subproblems. z = {3.236067978, -1.236067978}

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