Question

19.(x2 - y2) = 16 and (x - y) = 2. What is the value of 2xy?​

Answer 1

Step-by-step explanation:

x*2-y*2=16...(1)

x-y=2..... (2)

from eq 2

x=2+y

put in eq. 1

(2+y)^2-y^2=16

4+y^2+4y-y^2=16

4y=12

y=3

x=5

value of 2xy=2×3×5

=30