5Z^2-55Z+37=0

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Solution for 5Z^2-55Z+37=0 equation:


Simplifying
5Z2 + -55Z + 37 = 0

Reorder the terms:
37 + -55Z + 5Z2 = 0

Solving
37 + -55Z + 5Z2 = 0

Solving for variable 'Z'.

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

Divide each side by '5'.
7.4 + -11Z + Z2 = 0

Move the constant term to the right:

Add '-7.4' to each side of the equation.
7.4 + -11Z + -7.4 + Z2 = 0 + -7.4

Reorder the terms:
7.4 + -7.4 + -11Z + Z2 = 0 + -7.4

Combine like terms: 7.4 + -7.4 = 0.0
0.0 + -11Z + Z2 = 0 + -7.4
-11Z + Z2 = 0 + -7.4

Combine like terms: 0 + -7.4 = -7.4
-11Z + Z2 = -7.4

The Z term is -11Z.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11Z + 30.25 + Z2 = -7.4 + 30.25

Reorder the terms:
30.25 + -11Z + Z2 = -7.4 + 30.25

Combine like terms: -7.4 + 30.25 = 22.85
30.25 + -11Z + Z2 = 22.85

Factor a perfect square on the left side:
(Z + -5.5)(Z + -5.5) = 22.85

Calculate the square root of the right side: 4.780167361

Break this problem into two subproblems by setting 
(Z + -5.5) equal to 4.780167361 and -4.780167361.

Subproblem 1

Z + -5.5 = 4.780167361 Simplifying Z + -5.5 = 4.780167361 Reorder the terms: -5.5 + Z = 4.780167361 Solving -5.5 + Z = 4.780167361 Solving for variable 'Z'. Move all terms containing Z to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + Z = 4.780167361 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + Z = 4.780167361 + 5.5 Z = 4.780167361 + 5.5 Combine like terms: 4.780167361 + 5.5 = 10.280167361 Z = 10.280167361 Simplifying Z = 10.280167361

Subproblem 2

Z + -5.5 = -4.780167361 Simplifying Z + -5.5 = -4.780167361 Reorder the terms: -5.5 + Z = -4.780167361 Solving -5.5 + Z = -4.780167361 Solving for variable 'Z'. Move all terms containing Z to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + Z = -4.780167361 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + Z = -4.780167361 + 5.5 Z = -4.780167361 + 5.5 Combine like terms: -4.780167361 + 5.5 = 0.719832639 Z = 0.719832639 Simplifying Z = 0.719832639

Solution

The solution to the problem is based on the solutions from the subproblems. Z = {10.280167361, 0.719832639}

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