k^2-9k+20=0

Simple and best practice solution for k^2-9k+20=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 k^2-9k+20=0 equation:


Simplifying
k2 + -9k + 20 = 0

Reorder the terms:
20 + -9k + k2 = 0

Solving
20 + -9k + k2 = 0

Solving for variable 'k'.

Factor a trinomial.
(4 + -1k)(5 + -1k) = 0

Subproblem 1

Set the factor '(4 + -1k)' equal to zero and attempt to solve: Simplifying 4 + -1k = 0 Solving 4 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1k = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1k = 0 + -4 -1k = 0 + -4 Combine like terms: 0 + -4 = -4 -1k = -4 Divide each side by '-1'. k = 4 Simplifying k = 4

Subproblem 2

Set the factor '(5 + -1k)' equal to zero and attempt to solve: Simplifying 5 + -1k = 0 Solving 5 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1k = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1k = 0 + -5 -1k = 0 + -5 Combine like terms: 0 + -5 = -5 -1k = -5 Divide each side by '-1'. k = 5 Simplifying k = 5

Solution

k = {4, 5}

See similar equations:

| 6(4x-9)= | | 4y+5m= | | 5b-6-7b-4= | | y^2+8y=2 | | 17x-23y=11 | | 3f+4f= | | (a-2b)(a-b)= | | 10m+10=12m-10 | | y^2+8=2 | | 11r+8(1-9r)=9r+8(-11r-8) | | 8n-19=6n+7 | | (x+5)+(x-4)=11 | | X+14.8=1.2-7x | | x^2+x-240= | | 15r-15=8r-1 | | -(x-1)x=9(x-1) | | 5x-1=-4x+17 | | 9w+6=9w+3-5 | | p^4-15p^2+54=0 | | 2=-11(3n+9)-11(6-3n) | | 3-4lnx=-7 | | 4-3x=4-x | | -2z-1=-1.5 | | 0.5x+2=8+x | | 10x-2=20-x | | (2x+15)=(3x-10) | | 6m-2=7p-2 | | y=3xy-2y+x-5 | | h(t)=-16t+40t+5 | | 2x+4(22-x)=72 | | 4x+13=5-4x | | 5x^2=10x-5 |

Equations solver categories