Browse · harp Print → smc prealgebra intermediate Problem For integers a,b, and c define a,b,c to mean ab−bc+ca. Then 1,−1,2 equals: (A) −4 (B) −2 (C) 0 (D) 2 Solution — click to reveal Plug in the values for a,b,c and you get 1−1−(−1)2+21⇒1−1+2⇒2 2 Final answer D ← Previous problem Next problem →