Expand
$(2 x+5 y)^{2}$
Expand
$(2 x+5 y)^{2}$
$(2 x+5 y)^{2}$
$=(2 x)^{2}+2(2 x)(5 y)+(5 y)^{2}$
$=4 x^{2}+20 x y+25 y^{2}$
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