3x^3+16x^2+21x=0

Simple and best practice solution for 3x^3+16x^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+16x^2+21x=0 equation:


Simplifying
3x3 + 16x2 + 21x = 0

Reorder the terms:
21x + 16x2 + 3x3 = 0

Solving
21x + 16x2 + 3x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(21 + 16x + 3x2) = 0

Factor a trinomial.
x((3 + x)(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 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 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 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 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:

| 2-2x=1.86 | | 5y^2+3=-8y | | 1743=.83x | | 7x-9=5x-19 | | 3/4-7=14 | | 24n-32=160 | | 3x^2y+18xy-69y= | | C=5/9(122-32) | | 25-5x=3-x | | 2x-5m=0 | | 2x-4(x-3)=-6+2x-6 | | 7k^2-16+100=0 | | 5x-50=7x-130 | | 8x-3(3-x)=68 | | -2(4x-7)+5x=8-(3x+1)+3 | | 23+n-9=2 | | P(x)=x^5-5x^3+4x | | 0=120*1.1-80*1.1(1+x)-4(1+x) | | 5x-8(1)=17 | | 0.3x+3=15 | | 4/t-2-8/t^2-2t=-2 | | (4z+6)(4+0)=0 | | x+0.02x=127000 | | 3s^2+9s=0 | | 8x-3(6-x)=70 | | -1/3t=-4/3 | | log[2](x-4)=3 | | 2x+50+3x-20=180 | | -1/3=-4/3 | | -6x^2+12x+48= | | -1/3=-4/2 | | 4/7x^3;y/8x^4 |

Equations solver categories