r^2+6r=91

Simple and best practice solution for r^2+6r=91 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 r^2+6r=91 equation:


Simplifying
r2 + 6r = 91

Reorder the terms:
6r + r2 = 91

Solving
6r + r2 = 91

Solving for variable 'r'.

Reorder the terms:
-91 + 6r + r2 = 91 + -91

Combine like terms: 91 + -91 = 0
-91 + 6r + r2 = 0

Factor a trinomial.
(-13 + -1r)(7 + -1r) = 0

Subproblem 1

Set the factor '(-13 + -1r)' equal to zero and attempt to solve: Simplifying -13 + -1r = 0 Solving -13 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + -1r = 0 + 13 Combine like terms: -13 + 13 = 0 0 + -1r = 0 + 13 -1r = 0 + 13 Combine like terms: 0 + 13 = 13 -1r = 13 Divide each side by '-1'. r = -13 Simplifying r = -13

Subproblem 2

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

Solution

r = {-13, 7}

See similar equations:

| n^2+2n-19=-4 | | b/20=15 | | 2(X-3)-4=4X-1/3 | | 8r-7(-3r+8)=6(r+6) | | b^2-10b+18=2 | | 10+7r=9r-4 | | a^2-4a-24=8 | | k^2-21=-5 | | M-49=576 | | 4v/7=20 | | x-32=-17 | | -5+4=-36 | | -2j=7-3j | | 23+a=461 | | 1/2n-14=12 | | 2x-(2x+12)=6x | | -1+8t=10t-9 | | -14=-7u | | 3q+12= | | x=-6+9y-1 | | 14+14x-x^2=0 | | 5x=1450 | | 2cos^2x-5cosx+3=0 | | 10-2h=-10+8h | | 3x+8=5x-26 | | 1/3x-41/4x-6 | | -20=p/10 | | 7w=8w+6 | | 7-5q=-6q | | 25x-15=25x-15 | | n/3csd | | 4x+(-28)=2x+16 |

Equations solver categories