f^2-400=0

Simple and best practice solution for f^2-400=0 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^2-400=0 equation: 


Simplifying
f2 + -400 = 0

Reorder the terms:
-400 + f2 = 0

Solving
-400 + f2 = 0

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Add '400' to each side of the equation.
-400 + 400 + f2 = 0 + 400

Combine like terms: -400 + 400 = 0
0 + f2 = 0 + 400
f2 = 0 + 400

Combine like terms: 0 + 400 = 400
f2 = 400

Simplifying
f2 = 400

Take the square root of each side:
f = {-20, 20}

See similar equations:

| 15x^2-20=0 | | (1/U)-(3/1) | | 6x+16=13x-38 | | (x^2-5)/(x)-1=(5x-1)/x | | 0,169=80,446x+0,0001 | | 0,073=80,446x+0,0001 | | (x+3)/(x^2+5x+6)=(2)/(2x+6)-(3)/(x+2) | | y+6x+5x+2=0 | | 8x+24y=2800 | | 14n^2+40n=0 | | xy=x+y+3 | | xy+3x-5y+3=0 | | x^3+21y^2+5=0 | | 5x-6=3x-9 | | 14.5/50=42213 | | 6p^2-18p=0 | | (15a^4-10a^2+10)/5a | | 900/30 | | 3x-(18+x)/4-(5x-2)/3=7 | | 0,068=80,446x+0,0001 | | -(4y+2)-(-3y-5)=3 | | 12y^3-14y^2-40y= | | (5x-20)/21-(3x-12)/7-(2x-8)/3=0 | | 1.00x+.05(12-x)=.10(63) | | 234-2x=43x+19 | | 0,084=80,446x+0,0001 | | 3/(x+2)-(1/(x-2))=2/x | | 3(2x-1)-7=6-2(x+1) | | 6(x-3)=3(x+5) | | x^2-5-1x=5x-1 | | 5(3+x)=5(x+3) | | 10n^2+35n=0 |

Equations solver categories