4z^2+11=16z

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Solution for 4z^2+11=16z equation:


Simplifying
4z2 + 11 = 16z

Reorder the terms:
11 + 4z2 = 16z

Solving
11 + 4z2 = 16z

Solving for variable 'z'.

Reorder the terms:
11 + -16z + 4z2 = 16z + -16z

Combine like terms: 16z + -16z = 0
11 + -16z + 4z2 = 0

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

Divide each side by '4'.
2.75 + -4z + z2 = 0

Move the constant term to the right:

Add '-2.75' to each side of the equation.
2.75 + -4z + -2.75 + z2 = 0 + -2.75

Reorder the terms:
2.75 + -2.75 + -4z + z2 = 0 + -2.75

Combine like terms: 2.75 + -2.75 = 0.00
0.00 + -4z + z2 = 0 + -2.75
-4z + z2 = 0 + -2.75

Combine like terms: 0 + -2.75 = -2.75
-4z + z2 = -2.75

The z term is -4z.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4z + 4 + z2 = -2.75 + 4

Reorder the terms:
4 + -4z + z2 = -2.75 + 4

Combine like terms: -2.75 + 4 = 1.25
4 + -4z + z2 = 1.25

Factor a perfect square on the left side:
(z + -2)(z + -2) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(z + -2) equal to 1.118033989 and -1.118033989.

Subproblem 1

z + -2 = 1.118033989 Simplifying z + -2 = 1.118033989 Reorder the terms: -2 + z = 1.118033989 Solving -2 + z = 1.118033989 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + z = 1.118033989 + 2 Combine like terms: -2 + 2 = 0 0 + z = 1.118033989 + 2 z = 1.118033989 + 2 Combine like terms: 1.118033989 + 2 = 3.118033989 z = 3.118033989 Simplifying z = 3.118033989

Subproblem 2

z + -2 = -1.118033989 Simplifying z + -2 = -1.118033989 Reorder the terms: -2 + z = -1.118033989 Solving -2 + z = -1.118033989 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + z = -1.118033989 + 2 Combine like terms: -2 + 2 = 0 0 + z = -1.118033989 + 2 z = -1.118033989 + 2 Combine like terms: -1.118033989 + 2 = 0.881966011 z = 0.881966011 Simplifying z = 0.881966011

Solution

The solution to the problem is based on the solutions from the subproblems. z = {3.118033989, 0.881966011}

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