Question

How do you factor `b^2+16b+64`?

Answer 1

That `64 = 8*8` and `16 = 8+8` is a bit of a give away:

`(b+8)^2 = (b+8)(b+8)`

`= b*b + 8b + 8b + 8*8 = b^2 + 16b + 64`