Смотри..................
1.(9a^2-12a+4)-(3a^2+15a+a+5)=6a^2-28a-1
2.
1) 3m^2(n^2-16p^2)=3m^2(n-4)(n+4)
2) 3(x^2+4xy+4y^2)=3(x+2y)^2
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Answers & Comments
Смотри..................
1.(9a^2-12a+4)-(3a^2+15a+a+5)=6a^2-28a-1
2.
1) 3m^2(n^2-16p^2)=3m^2(n-4)(n+4)
2) 3(x^2+4xy+4y^2)=3(x+2y)^2