4d^3-81d=0

Simple and best practice solution for 4d^3-81d=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 4d^3-81d=0 equation:


Simplifying
4d3 + -81d = 0

Reorder the terms:
-81d + 4d3 = 0

Solving
-81d + 4d3 = 0

Solving for variable 'd'.

Factor out the Greatest Common Factor (GCF), 'd'.
d(-81 + 4d2) = 0

Factor a difference between two squares.
d((9 + 2d)(-9 + 2d)) = 0

Subproblem 1

Set the factor 'd' equal to zero and attempt to solve: Simplifying d = 0 Solving d = 0 Move all terms containing d to the left, all other terms to the right. Simplifying d = 0

Subproblem 2

Set the factor '(9 + 2d)' equal to zero and attempt to solve: Simplifying 9 + 2d = 0 Solving 9 + 2d = 0 Move all terms containing d to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 2d = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 2d = 0 + -9 2d = 0 + -9 Combine like terms: 0 + -9 = -9 2d = -9 Divide each side by '2'. d = -4.5 Simplifying d = -4.5

Subproblem 3

Set the factor '(-9 + 2d)' equal to zero and attempt to solve: Simplifying -9 + 2d = 0 Solving -9 + 2d = 0 Move all terms containing d to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 2d = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 2d = 0 + 9 2d = 0 + 9 Combine like terms: 0 + 9 = 9 2d = 9 Divide each side by '2'. d = 4.5 Simplifying d = 4.5

Solution

d = {0, -4.5, 4.5}

See similar equations:

| 0.4X+2=3 | | -13x+23=88 | | 8Y-4Y=24 | | 49d^3-81d=0 | | 4x+x=42 | | 3x+4=y | | (33b-7)-8(4b+1)=-7 | | 0.3X+1=-0.3X-8 | | 6x^3-7x^2+0x+2=0 | | 6x^3-7x^2+2=0 | | 2(x+3)=2x+7 | | 0.5(4X+10)=5 | | -3x-2(3x+6)=24 | | 4x-(3x+6)=2 | | y^2+ay+2y+2a=0 | | 8x+6x+2+7=9x+5+4x | | 58=-8s+18 | | 0.6X-1=X+7 | | 71-3x=6x+19 | | x^2-18x+80=0 | | x^2-6x+40=0 | | 5x+144=9x+120 | | 15=2p-5 | | 5x+24=2x+72 | | 6x*2+8x-3+2x*2-9x+8= | | 3y(y-7)=0 | | 2x+66=7x+146 | | 0.5X+6=-4 | | 3x+76=5x+64 | | 2x+130=7x+95 | | 5x+144=9x+168 | | 6x+37=9x+13 |

Equations solver categories