1-0.6*Z+0.08*Z^2=0

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Solution for 1-0.6*Z+0.08*Z^2=0 equation:


Simplifying
1 + -0.6Z + 0.08Z2 = 0

Solving
1 + -0.6Z + 0.08Z2 = 0

Solving for variable 'Z'.

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

Divide each side by '0.08'.
12.5 + -7.5Z + Z2 = 0

Move the constant term to the right:

Add '-12.5' to each side of the equation.
12.5 + -7.5Z + -12.5 + Z2 = 0 + -12.5

Reorder the terms:
12.5 + -12.5 + -7.5Z + Z2 = 0 + -12.5

Combine like terms: 12.5 + -12.5 = 0.0
0.0 + -7.5Z + Z2 = 0 + -12.5
-7.5Z + Z2 = 0 + -12.5

Combine like terms: 0 + -12.5 = -12.5
-7.5Z + Z2 = -12.5

The Z term is -7.5Z.  Take half its coefficient (-3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
-7.5Z + 14.0625 + Z2 = -12.5 + 14.0625

Reorder the terms:
14.0625 + -7.5Z + Z2 = -12.5 + 14.0625

Combine like terms: -12.5 + 14.0625 = 1.5625
14.0625 + -7.5Z + Z2 = 1.5625

Factor a perfect square on the left side:
(Z + -3.75)(Z + -3.75) = 1.5625

Calculate the square root of the right side: 1.25

Break this problem into two subproblems by setting 
(Z + -3.75) equal to 1.25 and -1.25.

Subproblem 1

Z + -3.75 = 1.25 Simplifying Z + -3.75 = 1.25 Reorder the terms: -3.75 + Z = 1.25 Solving -3.75 + Z = 1.25 Solving for variable 'Z'. Move all terms containing Z to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + Z = 1.25 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + Z = 1.25 + 3.75 Z = 1.25 + 3.75 Combine like terms: 1.25 + 3.75 = 5 Z = 5 Simplifying Z = 5

Subproblem 2

Z + -3.75 = -1.25 Simplifying Z + -3.75 = -1.25 Reorder the terms: -3.75 + Z = -1.25 Solving -3.75 + Z = -1.25 Solving for variable 'Z'. Move all terms containing Z to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + Z = -1.25 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + Z = -1.25 + 3.75 Z = -1.25 + 3.75 Combine like terms: -1.25 + 3.75 = 2.5 Z = 2.5 Simplifying Z = 2.5

Solution

The solution to the problem is based on the solutions from the subproblems. Z = {5, 2.5}

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