Respuesta:
A:(x+y)²=x²+2xy+y²
B:(2a+b)²=4a²+4ab+b²
C:(x-9)²=x²-18x+81
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Respuesta:
A:(x+y)²=x²+2xy+y²
B:(2a+b)²=4a²+4ab+b²
C:(x-9)²=x²-18x+81