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guys can someone please solve this? [(x+y)-5]2 ... please. take note that the 2 at the end is an exponent. thank u ... tomorrow will be my last day if i don't get the answer. so please someone save me from my math teacher

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Mlcparra16id
[(x+y)-5]²
This is a special product since (a-b)² = a²-2ab+b²

So:
[(x+y)-5]² = (x+y)²-2(x+y)(5)+5² = (x+y)²-10x-10y+25
(x+y)² is a special product in which it is equal to x²+2xy+y²

Therefore the answer is x²+2xy+y²-10x-10y+25