7r^3-55r^2-8r=0

Simple and best practice solution for 7r^3-55r^2-8r=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 7r^3-55r^2-8r=0 equation:


Simplifying
7r3 + -55r2 + -8r = 0

Reorder the terms:
-8r + -55r2 + 7r3 = 0

Solving
-8r + -55r2 + 7r3 = 0

Solving for variable 'r'.

Factor out the Greatest Common Factor (GCF), 'r'.
r(-8 + -55r + 7r2) = 0

Factor a trinomial.
r((-1 + -7r)(8 + -1r)) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(-1 + -7r)' equal to zero and attempt to solve: Simplifying -1 + -7r = 0 Solving -1 + -7r = 0 Move all terms containing r to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -7r = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -7r = 0 + 1 -7r = 0 + 1 Combine like terms: 0 + 1 = 1 -7r = 1 Divide each side by '-7'. r = -0.1428571429 Simplifying r = -0.1428571429

Subproblem 3

Set the factor '(8 + -1r)' equal to zero and attempt to solve: Simplifying 8 + -1r = 0 Solving 8 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1r = 0 + -8 -1r = 0 + -8 Combine like terms: 0 + -8 = -8 -1r = -8 Divide each side by '-1'. r = 8 Simplifying r = 8

Solution

r = {0, -0.1428571429, 8}

See similar equations:

| 9-(3x-3)=1-(-4x) | | 35=7/8x | | u=5(3+3) | | 48=6(a+b) | | 5v/2=-20 | | p=8(-2)+8 | | 3(2x-5)=6(x+4)+9 | | 13(3)+5=d | | 13z-2+30z-2=22z-6 | | 90=x+2+3x | | x/21=25/75 | | 5/2=-20 | | 56w^3+156w^2+40w=0 | | 16/2-2=w | | m+(m-3)+2m=57 | | 2x=44444 | | -5(10)+7=s | | 50r^4+145r^3+105r^2=0 | | h=(13+6)(2) | | 9x-4[6(x+4)-(x-6)]-3= | | 1200=5b-(500+2b) | | 15-3(5)=n | | 5/20=-20 | | 72+81h= | | e^8x=8 | | 15-13-5z= | | 12/5=6v | | 7/8u=28 | | 36u^2-81v^2=0 | | 5y(8y+9)+y(2y+2)= | | 49y^2-28y+4=0 | | KD=S |

Equations solver categories