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Simplifying 25z2 + -150z + 222 = 0 Reorder the terms: 222 + -150z + 25z2 = 0 Solving 222 + -150z + 25z2 = 0 Solving for variable 'z'. 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 = 3.346410162Subproblem 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 = 2.653589838Solution
The solution to the problem is based on the solutions from the subproblems. z = {3.346410162, 2.653589838}
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