Question

if x=i-2j+3k, y= -2i+k+3j then find (x+y).(x-y)

Answer 1

+41 Find x and 45. Find all the val d x and y su lidl = 20. the values of a such that (x, y, z) = (0, 0, 0) and 2 + 3k) + y (3i - 3j + k)+ z (- 4î +59) = (x + y + zk) x(i + ſ + ...

Answer:

Step-by-step explanation:

hope it helps you and mark as brliant

Answer 2

Answer:

we given

x= i -2j +3k , and y = -2i + k + 3j

so x+y = -i +j +4k

and x-y = 3i -5j +2k

so (x+y).(x-y) = -3-5+8

= -8 + 8

= 0