5k^2-36k-81=0

Simple and best practice solution for 5k^2-36k-81=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 5k^2-36k-81=0 equation:


Simplifying
5k2 + -36k + -81 = 0

Reorder the terms:
-81 + -36k + 5k2 = 0

Solving
-81 + -36k + 5k2 = 0

Solving for variable 'k'.

Factor a trinomial.
(-9 + -5k)(9 + -1k) = 0

Subproblem 1

Set the factor '(-9 + -5k)' equal to zero and attempt to solve: Simplifying -9 + -5k = 0 Solving -9 + -5k = 0 Move all terms containing k to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -5k = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -5k = 0 + 9 -5k = 0 + 9 Combine like terms: 0 + 9 = 9 -5k = 9 Divide each side by '-5'. k = -1.8 Simplifying k = -1.8

Subproblem 2

Set the factor '(9 + -1k)' equal to zero and attempt to solve: Simplifying 9 + -1k = 0 Solving 9 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1k = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1k = 0 + -9 -1k = 0 + -9 Combine like terms: 0 + -9 = -9 -1k = -9 Divide each side by '-1'. k = 9 Simplifying k = 9

Solution

k = {-1.8, 9}

See similar equations:

| 9=6+a/5 | | 3b+6=-21 | | 3(x+1)=x+6 | | -5(x+4)+249=18+31 | | 4ok+80=30k+120 | | 124-4x=14x+18 | | -11(x+6)+624=19+11 | | -11(x+6)+624=19 | | 7m^2+6m-1=0 | | 8m-7=-167 | | -4+8x=3x-9 | | 9x+14=-4 | | -7(6-t)=3(t+14) | | e^5x=14 | | 13p+6q=32 | | -18=5x+2 | | 5m+2(m+1)=31 | | 2-3x=-9 | | 4p+2q=10 | | 2(11-7x)-7=-55 | | 17m-75m+57000=60900-200m | | 3-8x=-53 | | 15-x=10 | | 2ab+4c=3+8c | | -3x+1=13 | | 4x+15=3x+24 | | 8=64y | | x+4=92 | | 2(-7+5c)=1 | | 11+w=24 | | 12x+7=-5 | | 5s+5=6s+3 |

Equations solver categories