Question

find (x+y)+(x-y), if
a)x =2\5, y =1\2
​

Answer 1

Given,
X=2/5,Y=1/2


Now,
(x+y)+(x-y)

(2/5+1/2)+(2/5-1/2)

(4+5/10)+(4-5/10)

(9/10)+(-1/10)

9/10-1/10

9-1/10

8/10

4/5


0.8