FORMULA:
DIFFERENCE OF TWO SQUARE
𝟐
𝟐
𝒂 − 𝒃 = (𝒂 + 𝒃)(𝒂 − 𝒃)
SUM OF TWO SQUARE
𝟐
𝒂
+
𝟐
𝒃 =
(𝒂 + 𝒃𝒊)(𝒂 − 𝒃𝒊)
This symbol (i) is an “imaginary
number”
i =√−𝟏
i = -1
example:
𝟐
𝒙
+ 𝟒 = (𝒂 + 𝟐𝒊)(𝒂 − 𝟐𝒊)