I was reading the book Linear Algebra and Its Applications by Gilbert Strong(4th edition page-15) and in the first chapter came across the line
Two combinations of two vectors in two dimensional space would seem to take 8 multiplications, but they can be done in 7. Can someone explain this following sentence?,
- What does it mean by the word "combination" and how it normally take 8 multiplications.
- How we can reduce it to 7? enter image description here
