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answer in attachment
4x²+20xy+25y²=>now the solving equation by (a²+b²+2ab=(a+b)²
now the equation is(2x+5y)²
the side of square is 2x+5y
the perimeter is 4(2x+5y)
then
8x+20y
ellina0127

Answer:


Step-by-step explanation:

1)The area of a square is 4x^2 + 20xy + 25y^2 =

4x^2+10xy+10xy+25y^2=2x(2x+5y)+5y(2x+5y)=(2x+5y)(2x+5y)=(2x+5y)^2

2)Perimeter of square= 4a (a is a side of square)

P= 4(2x+5y)=8x+20y



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