(xy + y^2)/5 × 11/(x + y)= (y(x+y) )/5 × 11/ (x+y) = (y(x + y) ×11)/5× (x+y) =( 11y)/5
При y=5, (11y)/5=(11×5)/5= 11
смотри решение на фото ..
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(xy + y^2)/5 × 11/(x + y)= (y(x+y) )/5 × 11/ (x+y) = (y(x + y) ×11)/5× (x+y) =( 11y)/5
При y=5, (11y)/5=(11×5)/5= 11
смотри решение на фото ..