f^2-6f+4=0

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Solution for f^2-6f+4=0 equation:


Simplifying
f2 + -6f + 4 = 0

Reorder the terms:
4 + -6f + f2 = 0

Solving
4 + -6f + f2 = 0

Solving for variable 'f'.

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -6f + -4 + f2 = 0 + -4

Reorder the terms:
4 + -4 + -6f + f2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -6f + f2 = 0 + -4
-6f + f2 = 0 + -4

Combine like terms: 0 + -4 = -4
-6f + f2 = -4

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

Add '9' to each side of the equation.
-6f + 9 + f2 = -4 + 9

Reorder the terms:
9 + -6f + f2 = -4 + 9

Combine like terms: -4 + 9 = 5
9 + -6f + f2 = 5

Factor a perfect square on the left side:
(f + -3)(f + -3) = 5

Calculate the square root of the right side: 2.236067978

Break this problem into two subproblems by setting 
(f + -3) equal to 2.236067978 and -2.236067978.

Subproblem 1

f + -3 = 2.236067978 Simplifying f + -3 = 2.236067978 Reorder the terms: -3 + f = 2.236067978 Solving -3 + f = 2.236067978 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + f = 2.236067978 + 3 Combine like terms: -3 + 3 = 0 0 + f = 2.236067978 + 3 f = 2.236067978 + 3 Combine like terms: 2.236067978 + 3 = 5.236067978 f = 5.236067978 Simplifying f = 5.236067978

Subproblem 2

f + -3 = -2.236067978 Simplifying f + -3 = -2.236067978 Reorder the terms: -3 + f = -2.236067978 Solving -3 + f = -2.236067978 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + f = -2.236067978 + 3 Combine like terms: -3 + 3 = 0 0 + f = -2.236067978 + 3 f = -2.236067978 + 3 Combine like terms: -2.236067978 + 3 = 0.763932022 f = 0.763932022 Simplifying f = 0.763932022

Solution

The solution to the problem is based on the solutions from the subproblems. f = {5.236067978, 0.763932022}

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