I need help with this math questions decomposing (IMPORTANT TEST)?

R80

New member
I need you to answer this and explain to be step by step. My teacher can't teach very well, he skips alot of steps.

1. 4X^2+4XY+Y^2

2. (2X-Y)^2-9

I have no clue on how to do this. 10 Points quick.
 
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