FIND

Asked by  | 21st Sep, 2008, 07:59: AM

Expert Answer:

we know that i2 = -1

using this x2 = 25 - 9 + 30i = 16 +30i

y2 = 25 - 9 -30i = 16 -30i

xy = 25 + 9 -15i +15i = 34

so x2 -xy +y2 = 2*16 -34 = -2

Answered by  | 21st Sep, 2008, 12:38: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.