Question

How do you factor `9a^2 - 64b^2`?

Answer 1

The answer is `9a^2-64b^2=(3a+8b)(3a-8b)`

Problem: `9a^2-64b^2`.

This expression fits the pattern of the difference of squares:

`a^2-b^2=(a+b)(a-b)`

`a=3a`
`b=8b`

`9a^2-64b^2=(3a+8b)(3a-8b)`