3x^4-21x=0

Simple and best practice solution for 3x^4-21x=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 3x^4-21x=0 equation: 


Simplifying
3x4 + -21x = 0

Reorder the terms:
-21x + 3x4 = 0

Solving
-21x + 3x4 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3x'.
3x(-7 + x3) = 0

Ignore the factor 3.

Subproblem 1
Set the factor 'x' equal to zero and attempt to solve:

Simplifying
x = 0

Solving
x = 0

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

Simplifying
x = 0

Subproblem 2
Set the factor '(-7 + x3)' equal to zero and attempt to solve:

Simplifying
-7 + x3 = 0

Solving
-7 + x3 = 0

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

Add '7' to each side of the equation.
-7 + 7 + x3 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + x3 = 0 + 7
x3 = 0 + 7

Combine like terms: 0 + 7 = 7
x3 = 7

Simplifying
x3 = 7

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Solution
x = {0}

See similar equations:

| -3(2t+8)=-48 | | 5(m-1)-4(m+2)=-13 | | 2x+y-3z=12 | | kx^2+(k+8)x+9=0 | | 7x-4=-88 | | 2x+(x-5)=31 | | 20y+3=19 | | 42y+3=69 | | 10y-20=8y+10 | | 3+5x=-37 | | -7x-21=4x | | 14(a-3)=-5-9 | | 9y-3=6y-12 | | 3(f-1)=12 | | 2x^2+8x-11=5 | | 6-4c=2c+24 | | 9y+1=34 | | 2x-1=9x+6 | | 72=3p^3+50p | | 0.60x+0.05(16-x)=0.10(30) | | -10(s+1)=68 | | 2x-11=4x+4 | | 9x-5=5x+3 | | 0.19-0.01(x+5)=-0.04(2-x) | | 5(x-8)-7x=-(2x-4) | | -100+4x=-5 | | x^4-6x^3+19x^2-36x+78=0 | | 8h+6=15 | | (x-6)*(3x^2+10x-1)= | | -3x+5x-9x=0 | | 3y+22=58 | | 3[p-2]+7=32-4[2p+5] |

Equations solver categories