Question

(a + b - c)^2 is equal to​

Answer 1

Answer:

$(a + b - c)^{2}$= $a^{2}+b^{2}+c^{2}+2ab-2bc-2ac$

Step-by-step explanation:

Identity: (x+y+z)^2=$x^{2}$+$y^{2} +z^{2}$ +2xy+2yz+2xz

Here,      x=a, y=b, z=-c

Applying the identity,

=> $a^{2}+b^{2}+c^{2}+ 2(a)(b) + 2(b)(-c) + 2(a)(-c)$

=>$a^{2}+b^{2}+c^{2}+2ab-2bc-2ac$

Hope this is helpful