Given: (x + m) (x + n) = x ^ 2-6x + 8, then 2mn-3m-3n=

Given: (x + m) (x + n) = x ^ 2-6x + 8, then 2mn-3m-3n=

(x+m)(x+n)=x^2+(m+n)x+mn
=x^2-6x+8
m+n=-6,mn=8
2mn-3m-3n=2mn-3(m+n)
=2*8+18=34