Question

cans someone please help me out? i will give brainliest

Answer 1

Answer:

okay

Step-by-step explanation:

sure how can I help?

Answer 2

Answer:

vectors are orthogonal

Step-by-step explanation:

If 2 vectors are orthogonal then their dot product = 0

u • v

= (i - j ) • (i + j )

= (1 × 1 ) + (- 1 × 1 )

= 1 + (- 1)

= 1 - 1

= 0

Since dot product is zero then the vectors are orthogonal