expand (2a-b-c)^2
don't snd unusual answers if anyone snd I will report his or her answer
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Answer:
4a(a-b-c)+(b+c)^2
Step-by-step explanation:
(2a-b-c)^2=4a^2 + b^2 + c^2 - 4ab - 4ac - 2bc
= 4a(a-b-c)+ b^w +c^2 - 2bc
= 4a(a-b-c)+(b+c)^2
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