Question

Simplify (1 + i)(1 - i)

Answer 1

we know that (a+b)(a-b) =a^2-b^2
hence the answer is 1^2-i^2 =1-(-1) =2

Answer 2

hey friend @BABYShawol184
you mad a mistake 1 line before
Therefore...
+i x -i ==i^2

Answer 3

Thank you @irshadno1 :)

Answer 4

Well....
(1+i)(1−i)

When multiplying binomials we can use F.O.I.L
Meaning you multiply the F: first term, the O: outer terms, the I: inner terms and the L: last terms so...
(1+i)(1−i)

(+1)(+1)+(+1)(−i)+(+i)(+1)+(+i)(−i)

Therefore...
\[1-i+i-i ^{2}\]


Simplified to ...
\[1-i^{2}\]