d^2-81=0

Simple and best practice solution for d^2-81=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 d^2-81=0 equation: 


Simplifying
d2 + -81 = 0

Reorder the terms:
-81 + d2 = 0

Solving
-81 + d2 = 0

Solving for variable 'd'.

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

Add '81' to each side of the equation.
-81 + 81 + d2 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + d2 = 0 + 81
d2 = 0 + 81

Combine like terms: 0 + 81 = 81
d2 = 81

Simplifying
d2 = 81

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

See similar equations:

| 3[x+7]-14=4 | | g^2+66=70 | | 0=-5+3y-x | | w^2-121=0 | | (4u+7)(8+u)=0 | | x+7+4x=12 | | z^2-61=16 | | [4-y]=7 | | 6x=30x-8 | | [5x+2]-4=18 | | 2x-1+2x-1=3x+2 | | a=3(B+C)forb | | BA+C=DforA | | 13.92d+4.032=2.3 | | 30=25(2y) | | [x-9]-13=-8 | | 3x^3-9x^2=12x | | [x-5]+6=0 | | 3x^2-9x^2=12x | | 2.58q+34.23=42.1-1.42 | | 3(1+2x)-x=7 | | (10r^9)(5r^66)-14r^33=0 | | [x+17]+10=70 | | 7m-6m=-7 | | y^2+2y-63= | | -4n-3n=0 | | 8.3m+19.4=-12.7-3.7m | | [y-8]-2=5 | | 5ln(x+6)-8=12 | | m-8-6=-16 | | y=3(-2)+4 | | [y-5]+6=0 |

Equations solver categories