Flag 9 grade maths> If x= 2-√5/2+√5 and y= 2+√5/2-√5, find th...
question mark

If x= 2-√5/2+√5 and y= 2+√5/2-√5, find the value of (x*x)-(y*y)

Abcd , 7 Years ago
Grade 9
anser 1 Answers
Arun

Last Activity: 7 Years ago

Dear student
 
x = 2-√5/2+√5 
on rationalization
 
x = (4 + 5 – 4 √5) / – 1
 
x =   4 √5 – 9
 
Now similarly y =   – 4 √5 – 9
 
Now question is asked for x^2 – y^2
 = (x+y) * (x – y)
 
 =  – 18 * 8 √5
 = – 144√5

star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments