Ответ:
1)a^2+2×а×5+5^2
(а+5)^2
2)(2х^2)-2×2х×1
(2х-1)^2
3) (8n)^2-2×8n×5q+(5q)^2
(8n-5q)^2
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Ответ:
1)a^2+2×а×5+5^2
(а+5)^2
2)(2х^2)-2×2х×1
(2х-1)^2
3) (8n)^2-2×8n×5q+(5q)^2
(8n-5q)^2