(x+y)^2-10x-10y+25=(x+y)^-10( )+25

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(x+y)^2-10x-10y+25=(x+y)^-10()+25(x+y)^2-10x-10y+25=(x+y)^-10()+25(x+y)^2-10x-10y+25=(x+y)^-10()+25(

(x+y)^2-10x-10y+25=(x+y)^-10( )+25
(x+y)^2-10x-10y+25=(x+y)^-10( )+25

(x+y)^2-10x-10y+25=(x+y)^-10( )+25
(x+y)^2-10x-10y+25=(x+y)^2-10( x+y)+25

(x+y)²-10x-10y+25=(x+y)²-10(x+y )+25

(x+y)^2-10x-10y+25=(x+y)^2-10(x+y )+25