Question

expand : (2a-b+c)^2

Full solution needed
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Answer 1

Step-by-step explanation:

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

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

4a^2 + b^2 + c^2 + 2(-2ab-bc +ac)

Answer 2

this is your answer

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