Question

factor 81b-25b^3

Answer 1

first take the b common

Answer 2

b (81-25b^2)

now factor this

Answer 3

would it be 64b

Answer 4

Hint: The form saifoo gave you has a difference of two squares in between the ( ).

Answer 5

hold on let me write this down

Answer 6

\[-b (5 b-9) (5 b+9)\]

Answer 7

factor 16a-9a^3

Answer 8

Use the same method:

1. Factor out the a.
2. Difference of two squares.