3x^3+2x^2-21x=0

Simple and best practice solution for 3x^3+2x^2-21x=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^3+2x^2-21x=0 equation:


Simplifying
3x3 + 2x2 + -21x = 0

Reorder the terms:
-21x + 2x2 + 3x3 = 0

Solving
-21x + 2x2 + 3x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(-21 + 2x + 3x2) = 0

Factor a trinomial.
x((-3 + -1x)(7 + -3x)) = 0

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 '(-3 + -1x)' equal to zero and attempt to solve: Simplifying -3 + -1x = 0 Solving -3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1x = 0 + 3 -1x = 0 + 3 Combine like terms: 0 + 3 = 3 -1x = 3 Divide each side by '-1'. x = -3 Simplifying x = -3

Subproblem 3

Set the factor '(7 + -3x)' equal to zero and attempt to solve: Simplifying 7 + -3x = 0 Solving 7 + -3x = 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 + -3x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -3x = 0 + -7 -3x = 0 + -7 Combine like terms: 0 + -7 = -7 -3x = -7 Divide each side by '-3'. x = 2.333333333 Simplifying x = 2.333333333

Solution

x = {0, -3, 2.333333333}

See similar equations:

| 4.7q-3.3-5.8q=-2.1q-3.8 | | 4x+7=5-x | | 4+2/3x=12 | | 10=1-n/4 | | y-32=11 | | 44=4 | | 2m-31=19-3m | | 2n+7-n-4= | | 3x^2=48+7x | | x^2+z/y^2+5z | | (9x^2-6x^2+18)/(3) | | 11x=55/11 | | 6x+5y=-12 | | c=5/9(f-32) | | 15x+7-2x=-19 | | 4n+4=22-2n | | -62= | | 3x+21=x+15 | | 3x-10=-6 | | 0=12+4y+5x | | 12x+-24=12x+24 | | n/7=12/3 | | 2/3t+3/4t=1-5/2t | | 8x+6x+2+7=11x+5+2x | | 10x-30=7x+6 | | -t/5-9=21 | | n-0.25n=42 | | -8+4(-5)= | | x-32=11 | | -2/3b+2/5=64/5 | | -8+4x-5= | | 7x^3+22x^2-24x=0 |

Equations solver categories