Question 234530
#1 Factor completely and if it's a prime, state that it's a prime: 
7x^9 - 28x^8 - 35x^7
Common Factor: 7x^7
Ans: 7x^7(x^2 - 4x -5)
Factor again:
Ans: 7x^7(x-5)(x+1)
=========================== 

#2 Same directions 
10s^2 + 4st - 6t^2
Common Factor: 2
Ans: 2(5s^2 + 2st - 3t^2)
Factor again:
Ans: 2(5s^2 + 5st - 3st - 3t^2)
2(5s(s+5)-3t(s+t))
2(s+5)(5s-3t)
=======================
Cheers,
Stan H.