Question

if x+y=11 and xy= 28,find x-y using appropriate identity​

Answer 1

Step-by-step explanation:

x+y=11

xy=28

(x-y) ^2=(x+y)^2-4xy

(x-y) ^2=11^2-4×28

(x-y) ^2=121-112

(x-y) ^2=9

x-y=√9

x-y=3

Is my answer is right then you know what is to do.