Question

if x + y =7/2 and xy =5/2 find x-y​

Answer 1

Answer:

3 /2

Step-by-step explanation:

let x-y=a sq both side

(x-y)^2=a^2

x^2+y^2-2xy=a^2

(x+y)^2-2xy-2xy=a^2

(7/2)^2-4*xy= a^2

49/4-4*5/2=a^2

(49/4)-10 =a^2

(49-40)/4=a^2

4a^2=9

a^2 =9/4

a=3/2