Grouping common factor: x? (x？ + 1)+(x？ + 1)= 12; ∴(x？ + 1)(x？ + 1)= 12

(2). In Equation X? -( 12-m)x+m- 1=0, where a= 1, b=-( 12-m) and c=m- 1, the final product can be obtained by directly applying Vieta's theorem:

x？ +x？ =-b/a =-[-( 12-m)]/ 1 = 12-m； x？ x？ = c/a =(m- 1)/ 1 = m- 1。