Question

Factor completely. 10,000 - d^4 = x^10 y^8 z^8 - x^4 y^9 z^2 =

Answer 1

1. 
(100 + d^2)(d + 10)(d - 10)

Use the rule of splitting perfect squares to get the factors. 

2. 
x^4y^8z^2(x^2z^6 - y)

The first term is the greatest common factor.