1.

(a + b - c)^2 is equal to​

Answer»

ANSWER:

(a + b - c)^{<klux>2</klux>}= 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



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