Ответ:
а) \((6a+10x)^2=4(3a+5x)^2\).
б) \((2c+1)(c-2c)=(2c+1)(-c)=-c(2c+1)\).
в) \(81-64x^2y^2=9^2-(8xy)^2=(9-8xy)(9+8xy)\).
г) \(64-8n^3=8(8-n^3)\).
а) \((6a+10x)^2=4(3a+5x)^2\).
б) \((2c+1)(c-2c)=(2c+1)(-c)=-c(2c+1)\).
в) \(81-64x^2y^2=9^2-(8xy)^2=(9-8xy)(9+8xy)\).
г) \(64-8n^3=8(8-n^3)\).