25z^2+222=150z

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Solution for 25z^2+222=150z equation:


Simplifying
25z2 + 222 = 150z

Reorder the terms:
222 + 25z2 = 150z

Solving
222 + 25z2 = 150z

Solving for variable 'z'.

Reorder the terms:
222 + -150z + 25z2 = 150z + -150z

Combine like terms: 150z + -150z = 0
222 + -150z + 25z2 = 0

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

Divide each side by '25'.
8.88 + -6z + z2 = 0

Move the constant term to the right:

Add '-8.88' to each side of the equation.
8.88 + -6z + -8.88 + z2 = 0 + -8.88

Reorder the terms:
8.88 + -8.88 + -6z + z2 = 0 + -8.88

Combine like terms: 8.88 + -8.88 = 0.00
0.00 + -6z + z2 = 0 + -8.88
-6z + z2 = 0 + -8.88

Combine like terms: 0 + -8.88 = -8.88
-6z + z2 = -8.88

The z term is -6z.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6z + 9 + z2 = -8.88 + 9

Reorder the terms:
9 + -6z + z2 = -8.88 + 9

Combine like terms: -8.88 + 9 = 0.12
9 + -6z + z2 = 0.12

Factor a perfect square on the left side:
(z + -3)(z + -3) = 0.12

Calculate the square root of the right side: 0.346410162

Break this problem into two subproblems by setting 
(z + -3) equal to 0.346410162 and -0.346410162.

Subproblem 1

z + -3 = 0.346410162 Simplifying z + -3 = 0.346410162 Reorder the terms: -3 + z = 0.346410162 Solving -3 + z = 0.346410162 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + z = 0.346410162 + 3 Combine like terms: -3 + 3 = 0 0 + z = 0.346410162 + 3 z = 0.346410162 + 3 Combine like terms: 0.346410162 + 3 = 3.346410162 z = 3.346410162 Simplifying z = 3.346410162

Subproblem 2

z + -3 = -0.346410162 Simplifying z + -3 = -0.346410162 Reorder the terms: -3 + z = -0.346410162 Solving -3 + z = -0.346410162 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + z = -0.346410162 + 3 Combine like terms: -3 + 3 = 0 0 + z = -0.346410162 + 3 z = -0.346410162 + 3 Combine like terms: -0.346410162 + 3 = 2.653589838 z = 2.653589838 Simplifying z = 2.653589838

Solution

The solution to the problem is based on the solutions from the subproblems. z = {3.346410162, 2.653589838}

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