Question

expanded form of (x+y-z)² is​

Answer 1

Answer:

x²+y²+z²+2xy-2yz-2zx

Step-by-step explanation:

Answer 2

Answer:

it is identity of (a+b+c)^2

(a+b+c)^2= a^2+b^2+c^2+2ab+2bc+2ca

a=x,b=y,c=-z so, according to the identity :-