Question

If x+y=8 and x-y=5, what is the value of x^2-y^2

Answer 1

Answer:

40.

Step-by-step explanation:

x = 6.5

y = 1.5

So, 6.5² - 1.5² = 40.

Please mark this "brainliest" (the crown) if you like this answer!

Answer 2

Answer:

40

Step-by-step explanation:

by adding both the equation

x+y=8 +( x-y=5)

=2x= 13

= x= 13/2

by putting value of x in eq 2

13/2-y=5

13-2y= 10

y= 13-10/2

y= 3/2

now x^2-y^2

= (13/2)^2-(3/2)^2

= 169/4-9/4

=160/4

= 40 answer