k^2-k-20=0

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


Simplifying
k2 + -1k + -20 = 0

Reorder the terms:
-20 + -1k + k2 = 0

Solving
-20 + -1k + 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:

| 22-(7-3x)=4+3(4x-1) | | 12x+8=10+14 | | (3x+4)(x+2)=0 | | 2r^2-5r+2=0 | | 2(x+3)=3x+6 | | 2m^2-m-10=0 | | 179-2x=25x+23 | | (b+1)(3b-2)=0 | | (k+3)(k+2)=0 | | p^2-4p+3=3 | | (x+5)(x+1)=0 | | 2x+42=346 | | 4x+8-(6x-3)= | | 6(1-5m)-8(2m-4)=38 | | 8x-15=x-1*4+6 | | (n-4)(n+1)=0 | | 30y+60x=600 | | 10n-11=59 | | -2y+12=-24 | | -72=4(-4-5r)+4(-6r+8) | | 10x+6=-7x+9 | | Ln(x+7)+ln(x-3)=ln(x)+ln(2) | | -10=-4(5+v)-2(1-8v) | | 7x^2+59x+24= | | (n+5)*8=80 | | x+2-3=0 | | 64=8(1-5a)+8(7-2a) | | 25=5w-10 | | (n-10)*4=20 | | -4x-10=-50 | | 4-(3x+2)=5x-9 | | (n+3)*2=12 |

Equations solver categories