Question

(a+b-c)2 is equal to​

Answer 1

Answer:

(a+b-c)^2

Can be expressed as

=(a+b-c)*(a+b-c)

On expansion of the above expression

=a*(a+b-c)+b*(a+b-c)-c*(a+b-c)

=a^2+ab-ac+ba+b^2-bc-ca-cb+c^2

Rearrange the above equation

=a^2+b^2+c^2+ab+ba-ac-ca-bc-cb

Rearrange by commutative property

=a^2+b^2+c^2+ab+ab-ac-ac-bc-bc

=a^2+b^2+c^2+2ab-2ac-2bc

On taking out the common terms, the expansion results in the final answer

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

Step-by-step explanation:

PLS MARK AS BRAINLIEST

Answer 2

Step-by-step explanation:

$(a + b + c) {}^{2} = \\ a {}^{2} + b {}^{2} + c {}^{2} + 2ab + 2bc + 2ca$

I hope it helps you Mark me as brainlist please please please.............