8k^2-8=640

Simple and best practice solution for 8k^2-8=640 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 8k^2-8=640 equation: 


Simplifying
8k2 + -8 = 640

Reorder the terms:
-8 + 8k2 = 640

Solving
-8 + 8k2 = 640

Solving for variable 'k'.

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

Add '8' to each side of the equation.
-8 + 8 + 8k2 = 640 + 8

Combine like terms: -8 + 8 = 0
0 + 8k2 = 640 + 8
8k2 = 640 + 8

Combine like terms: 640 + 8 = 648
8k2 = 648

Divide each side by '8'.
k2 = 81

Simplifying
k2 = 81

Take the square root of each side:
k = {-9, 9}

See similar equations:

| x^2-1=80 | | k^2=37 | | 5x+6=x+74 | | 5x+40=8x+15 | | 6p^2-3=147 | | X=4p+p/2+p/6-p/90 | | 4n^2+6=158 | | 6x^2=158 | | a^2-8=-7 | | r^2=0 | | 5k^2-20k-64=0 | | a^2+12a-94=0 | | x^2+16x-23=0 | | 3x(4x^2-256)=0 | | x+8-11-3+4=10 | | 5(3-2x)=20 | | 7n^2-10n-53=-5 | | 4b^2+b-66=-6 | | 9k^2-12k-51=-6 | | 3p^2+17p-30=-10 | | 60-10/25=-2 | | 9p^2+19p-66=8 | | 25/x-10=-2 | | 10g-6=7g+12 | | 10a^2-20a-80=0 | | 3k+2=10+k | | 10n^2+20n-30=0 | | r^2-4r-31=0 | | v^2+8v-48=0 | | x*3=42 | | b^2+14b+40=0 | | r^2-16r-57=0 |

Equations solver categories