Question

if (a+b+c)²= a²+b²+c²+2ab+2bc+2ac
then expand the following-

(i) (-a-b-c)²​

Answer 1

Answer:

hope it helps you

Step-by-step explanation:

(-a-b-c)²= a²+b²+c²-2ab+2bc-2ca

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Answer 2

Step-by-step explanation:

a^2+b^2+C^2-2ab-2bc-2Ca