simplifying
x2+kx + -12=0
Recorder the terms: -12+kx+x2 =0
solving: -12+ kx + x2=0
now solving for variable 'K'
move all the terms containing K to the left, all other terms to the right.
Add '12' to each side of the equation.
-12+12+kx+ x2 =0+12
combine like terms: -12+12=0
0+kx +x2=0+12
combine like terms: 0+12=12
kx+x2+-1x2= 12 + -1x2
combine like terms: x2 + -1x2=0
kx+0 =12+-1x2
kx= 12+-1x2
divide each side by 'x'.
k=12x-1 + x
simplifying: K=12x -1 +-1x
Anw: K=12x -1+ -1x
