Question

If c & d = c2 + d2 - 4, then 2 & 1= ?
Answer choices are:
-2
-1
0
1
2

Answer 1

c & d means c=d right?

Answer 2

That's where I was confused, I wasn't sure what it was trying to say.

Answer 3

its an operation

if c&d = c^2 + d^2 -4

then 2&1 means you have to plug in 2 and 1 in place of c and d

Answer 4

Thank you!

Answer 5

so now tell me the ans?

Answer 6

?

Answer 7

1, right?

Answer 8

yes