5xy^2+15y= 5y(xy+3)
(7аb-14а)^2= 49a^2b^2-196a^2b+196a^2= 49a^2(b^2-4b+4)
5bc^2+bc= bc(5c+1)
(x+5)^2=x^2+10x+25
(a-2)^2=a^2-4a+4
(5a-2)^2=25a^2-20a+4
(7м-3н)^2= 49м^2-42мн+9н^2
(6y+4x)^2= 36y^2+48xy+16x^2
5xy^2+15y= 5y(xy+3)
(7аb-14а)^2= 49a^2b^2-196a^2b+196a^2= 49a^2(b^2-4b+4)
5bc^2+bc= bc(5c+1)
(x+5)^2=x^2+10x+25
(a-2)^2=a^2-4a+4
(5a-2)^2=25a^2-20a+4
(7м-3н)^2= 49м^2-42мн+9н^2
(6y+4x)^2= 36y^2+48xy+16x^2