-3(3z+3)*3z=-53

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Solution for -3(3z+3)*3z=-53 equation:


Simplifying
-3(3z + 3) * 3z = -53

Reorder the terms:
-3(3 + 3z) * 3z = -53

Reorder the terms for easier multiplication:
-3 * 3z(3 + 3z) = -53

Multiply -3 * 3
-9z(3 + 3z) = -53
(3 * -9z + 3z * -9z) = -53
(-27z + -27z2) = -53

Solving
-27z + -27z2 = -53

Solving for variable 'z'.

Reorder the terms:
53 + -27z + -27z2 = -53 + 53

Combine like terms: -53 + 53 = 0
53 + -27z + -27z2 = 0

Begin completing the square.  Divide all terms by
-27 the coefficient of the squared term: 

Divide each side by '-27'.
-1.962962963 + z + z2 = 0

Move the constant term to the right:

Add '1.962962963' to each side of the equation.
-1.962962963 + z + 1.962962963 + z2 = 0 + 1.962962963

Reorder the terms:
-1.962962963 + 1.962962963 + z + z2 = 0 + 1.962962963

Combine like terms: -1.962962963 + 1.962962963 = 0.000000000
0.000000000 + z + z2 = 0 + 1.962962963
z + z2 = 0 + 1.962962963

Combine like terms: 0 + 1.962962963 = 1.962962963
z + z2 = 1.962962963

The z term is z.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + z2 = 1.962962963 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + z2 = 1.962962963 + 0.25

Combine like terms: 1.962962963 + 0.25 = 2.212962963
1.25 + z2 = 2.212962963

Factor a perfect square on the left side:
(z + 0.5)(z + 0.5) = 2.212962963

Calculate the square root of the right side: 1.487603093

Break this problem into two subproblems by setting 
(z + 0.5) equal to 1.487603093 and -1.487603093.

Subproblem 1

z + 0.5 = 1.487603093 Simplifying z + 0.5 = 1.487603093 Reorder the terms: 0.5 + z = 1.487603093 Solving 0.5 + z = 1.487603093 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + z = 1.487603093 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + z = 1.487603093 + -0.5 z = 1.487603093 + -0.5 Combine like terms: 1.487603093 + -0.5 = 0.987603093 z = 0.987603093 Simplifying z = 0.987603093

Subproblem 2

z + 0.5 = -1.487603093 Simplifying z + 0.5 = -1.487603093 Reorder the terms: 0.5 + z = -1.487603093 Solving 0.5 + z = -1.487603093 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + z = -1.487603093 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + z = -1.487603093 + -0.5 z = -1.487603093 + -0.5 Combine like terms: -1.487603093 + -0.5 = -1.987603093 z = -1.987603093 Simplifying z = -1.987603093

Solution

The solution to the problem is based on the solutions from the subproblems. z = {0.987603093, -1.987603093}

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