Question

8x^3-125y^3+180xy+216

Answer 1

let  a = 2 x       b = - 5 y        c = 6

8 x³ - 125 y³ + 216 + 180 x y

   = a³ + b³ + c³ - 3 a b c

   = (a + b + c) (a² + b² + c² - ab  - b c - ca)         we know this.

   = (2x - 5 y + 6) (4 x² + 25 y² + 36 + 10 x y + 30 y - 12 x)