Question

if a=2:-√5/2-√5 and L=2-√5/2+√5 find the value of a²-b²

Answer 1

(2-√5/2-√5)²-(2-√5/2+√5)²
=[(2-√5/2-√5)+(2-√5/2-√5)][(2-√5/2+√5)-(2-√5/2+√5)]
=(2-√5/2-√5+2-√5/2+√5)(2-√5/2-√5-2+√5/2-√5)
=(4-√5)(-2√5)
=-8√5+10

Here is your answer step by step may be this will help you.

Thankuu