f^2+8f=41

Simple and best practice solution for f^2+8f=41 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for f^2+8f=41 equation:


Simplifying
f2 + 8f = 41

Reorder the terms:
8f + f2 = 41

Solving
8f + f2 = 41

Solving for variable 'f'.

Reorder the terms:
-41 + 8f + f2 = 41 + -41

Combine like terms: 41 + -41 = 0
-41 + 8f + f2 = 0

Begin completing the square.

Move the constant term to the right:

Add '41' to each side of the equation.
-41 + 8f + 41 + f2 = 0 + 41

Reorder the terms:
-41 + 41 + 8f + f2 = 0 + 41

Combine like terms: -41 + 41 = 0
0 + 8f + f2 = 0 + 41
8f + f2 = 0 + 41

Combine like terms: 0 + 41 = 41
8f + f2 = 41

The f term is 8f.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8f + 16 + f2 = 41 + 16

Reorder the terms:
16 + 8f + f2 = 41 + 16

Combine like terms: 41 + 16 = 57
16 + 8f + f2 = 57

Factor a perfect square on the left side:
(f + 4)(f + 4) = 57

Calculate the square root of the right side: 7.549834435

Break this problem into two subproblems by setting 
(f + 4) equal to 7.549834435 and -7.549834435.

Subproblem 1

f + 4 = 7.549834435 Simplifying f + 4 = 7.549834435 Reorder the terms: 4 + f = 7.549834435 Solving 4 + f = 7.549834435 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + f = 7.549834435 + -4 Combine like terms: 4 + -4 = 0 0 + f = 7.549834435 + -4 f = 7.549834435 + -4 Combine like terms: 7.549834435 + -4 = 3.549834435 f = 3.549834435 Simplifying f = 3.549834435

Subproblem 2

f + 4 = -7.549834435 Simplifying f + 4 = -7.549834435 Reorder the terms: 4 + f = -7.549834435 Solving 4 + f = -7.549834435 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + f = -7.549834435 + -4 Combine like terms: 4 + -4 = 0 0 + f = -7.549834435 + -4 f = -7.549834435 + -4 Combine like terms: -7.549834435 + -4 = -11.549834435 f = -11.549834435 Simplifying f = -11.549834435

Solution

The solution to the problem is based on the solutions from the subproblems. f = {3.549834435, -11.549834435}

See similar equations:

| x^2-6=10 | | 9x-8+x+32=180 | | 6x-18+12-3x=15 | | 6x+10=(-20) | | 7x-5x-16=8 | | (6x+1)(5x-17)(9x-24)=180 | | u^2+8u-15=0 | | 12x^2+39x+30= | | 5x^2+15x=40 | | 10x^3-34x^2+12x=0 | | x-7=2/3x | | -124-7x-2x=65 | | 4x^3-26x^2+30x=0 | | Z=14+y | | Ln(x/0,105)=-2,0232 | | (35x-10)+(35x)=0 | | 2/c=9-7 | | 14s^2+39s+10=0 | | 0=3y-7x-6 | | 14s^2+29s+10=0 | | 7-5y=3y-16 | | 34.20=2x-2.4 | | -7g+3=0 | | y=20-2.4 | | 9(y^2)-5y-4=0 | | x+x-7+x+40=180 | | 9n^2-9n-1=0 | | -8u^2+9u=0 | | 100+22x=70+75x | | x^2-3x-2=-x | | (x-7)2-(1+x)2=2(3x-4) | | 48000/746= |

Equations solver categories