pixel2metal
New member
- Joined
- Nov 18, 2021
- Messages
- 2
Daft question feel like I should know this:
9x^2 - 4y^2
It factorises to (3x+2y)(3x-2y) but I'm not sure how to get there. Something to do with completing the square? which I've never been very good at..
Thanks!
9x^2 - 4y^2
It factorises to (3x+2y)(3x-2y) but I'm not sure how to get there. Something to do with completing the square? which I've never been very good at..
Thanks!