Question

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


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Answer 1

Answer:

$(2a + b - c {)}^{2} </p><p></p><p>$

Step-by-step explanation:

With attachment........

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Answer 2

Step-by-step explanation:

(2a+b-c) ^2

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

(2a+b-c) ^2=(2a)^2+b^2+(-c)^2+2(2a)(b)+2(b)(-c)+2(-c)(2a)

=4a^2+b^2+c^2+4ab-2bc-4ac