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Studentka2010 [4]
3 years ago
9

(07.03. 07.04 MC)

Mathematics
1 answer:
posledela3 years ago
8 0

Answer:

A) 4x^2+20x+25=(2x)^2+2*(2x)*5+5^2=(2x+5)^2

Area=(side)^2, side=sqrt(area)=sqrt((2x+5)^2)=2x+5

B) 4x^2-9y^2=(2x-3y)(2x+3y), these are the dimensions of the rectangle

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