Question

factor using foil method.

(9+8i)(9-8i)

Answer 1

64i^2+142i+81

Answer 2

hold on not right

Answer 3

Easy .First 9*9 + 9*(-8i) + 8i*9 + 8i*(-8i)
Change i square to -1
This is answer 81 -72i + 72i + 64 = 145

Answer 4

first, is i imaginary?

Answer 5

or is it just a number?

Answer 6

can anyone try to help me with mine??

Answer 7

You also do that , but can check in (a + bi) (c+di), if a*d =-c*d and b*d=-X,
This mean the equation is a numeric

Answer 8

I can