Question

if (x+y) =9, xy = 20 find (x-y) ​

Answer 1

Answer:

(x+y)²=x²+2xy+y²

(9)²=x²+y²+2(20)

81-40=x²+y²

x²+y²=41

(x-y)²=x²+y²-2xy

(x-y)²=41-2(20)

(x-y)²=1

x-y=1

hope it helps you.....

Answer 2

Answer:

1

Step-by-step explanation:

x-y=√(x+y)2-4(xy)

=√81-80

=√1

=1

thank you mark this answer as brainliest please