Question

Which is a factor of 6x3y + 6xy – 12x2– 12 ?


x2 + 1
x + 2
xy – 1
x2 – 2

Answer 1

x2+1 so the first is right

Answer 2

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