Question

what are the factors of 6x3y + 6xy − 12x2 − 12

Answer 1

6x3y + 6xy − 12x2 − 12
=6xy(x^2 + 1) -12(x^2+1)
=(x^2 +1)(6xy - 12)
=6(x^2 +1)(xy - 2)