f(f+2)=46

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Solution for f(f+2)=46 equation:


Simplifying
f(f + 2) = 46

Reorder the terms:
f(2 + f) = 46
(2 * f + f * f) = 46
(2f + f2) = 46

Solving
2f + f2 = 46

Solving for variable 'f'.

Reorder the terms:
-46 + 2f + f2 = 46 + -46

Combine like terms: 46 + -46 = 0
-46 + 2f + f2 = 0

Begin completing the square.

Move the constant term to the right:

Add '46' to each side of the equation.
-46 + 2f + 46 + f2 = 0 + 46

Reorder the terms:
-46 + 46 + 2f + f2 = 0 + 46

Combine like terms: -46 + 46 = 0
0 + 2f + f2 = 0 + 46
2f + f2 = 0 + 46

Combine like terms: 0 + 46 = 46
2f + f2 = 46

The f term is 2f.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2f + 1 + f2 = 46 + 1

Reorder the terms:
1 + 2f + f2 = 46 + 1

Combine like terms: 46 + 1 = 47
1 + 2f + f2 = 47

Factor a perfect square on the left side:
(f + 1)(f + 1) = 47

Calculate the square root of the right side: 6.8556546

Break this problem into two subproblems by setting 
(f + 1) equal to 6.8556546 and -6.8556546.

Subproblem 1

f + 1 = 6.8556546 Simplifying f + 1 = 6.8556546 Reorder the terms: 1 + f = 6.8556546 Solving 1 + f = 6.8556546 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + f = 6.8556546 + -1 Combine like terms: 1 + -1 = 0 0 + f = 6.8556546 + -1 f = 6.8556546 + -1 Combine like terms: 6.8556546 + -1 = 5.8556546 f = 5.8556546 Simplifying f = 5.8556546

Subproblem 2

f + 1 = -6.8556546 Simplifying f + 1 = -6.8556546 Reorder the terms: 1 + f = -6.8556546 Solving 1 + f = -6.8556546 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + f = -6.8556546 + -1 Combine like terms: 1 + -1 = 0 0 + f = -6.8556546 + -1 f = -6.8556546 + -1 Combine like terms: -6.8556546 + -1 = -7.8556546 f = -7.8556546 Simplifying f = -7.8556546

Solution

The solution to the problem is based on the solutions from the subproblems. f = {5.8556546, -7.8556546}

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