Question

if x+y=16
x×y=40
find x -y=​

Answer 1

Step-by-step explanation:

=> x+y=15

=> xy=40

=> x-y=?

=>> To get x-y, we'll apply the formula

(a+b)^2-4ab.

We're using this formula to get x-y as the result.

a=x

b=y

=> x-y=(a+b)^2-4ab

=> (a+b)^2-4ab

=> (x+y)^2-4xy [x+y=15(given)] , [xy=40(given)]

=> (15)^2-4(40)

=> 225-160

=> 65