Question

X square+y square-z square-2xy​

Answer 1

Answer:

Step-by-step explanation:

X ^ 2 + Y ^ 2 + 2xy - Z ^ 2

Using identity -- a ^ 2 + b ^2 + 2ab =(a + b ) ^2

= ( X + Y ) ^2 - Z ^2

using identity -- ( a )^2 - ( b ) ^2 = ( a + b ) ( a - b )

= ( X + Y + Z ) ( X + Y - Z )