Question

(a+b-c)^2 with proof
pls help :(​

Answer 1

Answer:

Here your ans,in attachment.,prove

Answer 2

Answer:

we can use the identity here..which states

(x+y+z)²= x²+y²+z²+2xy+2yz+2yx

according to question

(a+b-c)²= a²+b²+(-c)²+2ab+2b(-c)+2(-c)a

= a²+b²+c²+2ab-2bc-2ca

hope it helps..