Question

Choose one of the factors for 1331x^3-8y^3
a.4
b.11x-2y
c.121x^2+44xy+4y^2
d.121x^2-22xy+4y^2

Answer 1

1331x^3 = 11 x 11 x 11 x X x X x X
and 8y^3 = 2 x 2 x 2 x Y x Y x Y
so you have 11x - 2 y

Answer 2

Ax^3-Bx^3) = (A-B)(A^2-AB +B^2)