a^4-81=0

Simple and best practice solution for a^4-81=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 a^4-81=0 equation:


Simplifying
a4 + -81 = 0

Reorder the terms:
-81 + a4 = 0

Solving
-81 + a4 = 0

Solving for variable 'a'.

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

Add '81' to each side of the equation.
-81 + 81 + a4 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + a4 = 0 + 81
a4 = 0 + 81

Combine like terms: 0 + 81 = 81
a4 = 81

Simplifying
a4 = 81

Reorder the terms:
-81 + a4 = 81 + -81

Combine like terms: 81 + -81 = 0
-81 + a4 = 0

Factor a difference between two squares.
(9 + a2)(-9 + a2) = 0

Factor a difference between two squares.
(9 + a2)((3 + a)(-3 + a)) = 0

Subproblem 1

Set the factor '(9 + a2)' equal to zero and attempt to solve: Simplifying 9 + a2 = 0 Solving 9 + a2 = 0 Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + a2 = 0 + -9 Combine like terms: 9 + -9 = 0 0 + a2 = 0 + -9 a2 = 0 + -9 Combine like terms: 0 + -9 = -9 a2 = -9 Simplifying a2 = -9 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(3 + a)' equal to zero and attempt to solve: Simplifying 3 + a = 0 Solving 3 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + a = 0 + -3 Combine like terms: 3 + -3 = 0 0 + a = 0 + -3 a = 0 + -3 Combine like terms: 0 + -3 = -3 a = -3 Simplifying a = -3

Subproblem 3

Set the factor '(-3 + a)' equal to zero and attempt to solve: Simplifying -3 + a = 0 Solving -3 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + a = 0 + 3 Combine like terms: -3 + 3 = 0 0 + a = 0 + 3 a = 0 + 3 Combine like terms: 0 + 3 = 3 a = 3 Simplifying a = 3

Solution

a = {-3, 3}

See similar equations:

| 8-3G=2c-2 | | 3.01+4.5= | | 5y+6=y-14 | | -3x-4x=-8-3x | | 3(-3n+2)+5=6(1-9n) | | 5x=37-12 | | 6+4y=-10 | | 3p-52=52 | | x-6=96 | | 6(p-8)=6p-3(11p-6) | | -4x-(-8-4x)=x | | 3(x+4)=8x-18 | | 2m+6=4m+2 | | 3m-7=6m+5 | | 1.5(x-3)=-4.5 | | 2k-(8k+4)= | | 5x+2-3=12 | | 3x-5=8x-30 | | 2(2q+1)=4-3k | | 2b^2=8+8 | | -(4h+8)+2h=20 | | 2x+2y=1 | | x^2+6x-19=0 | | 7-2n=8-(-4n) | | .40y+6=10 | | 3x+9+12x=14 | | 3x^3y^3-12x^2y^3+12xy^3= | | x^2+10x+25=7 | | 2t+9=5t+12 | | -4=3+9y | | -(4-z)=3z+9 | | 3x=8+5x |

Equations solver categories