Question

if x^2 - y^2 = 60 and x + y = 5 square root 6 then x - y equals?

A- square root 6
B- 2 square root 6
C- 3 square root 6
D- 4 square root 6

Please im stuck on this question in my new lesson

Answer 1

Answer:

12

Step-by-step explanation:

x^2 - y^2 = 60

x + y = 5

x^2 - y^2 = x + y . x-y

60/5

Answer 2

x2 -y2= (x+y)(x-y)

60 = ( 5 square root 6 ) (x-y)

(x-y) = 60 ÷ ( 5 square root 6)

x-y = 2 square root 6