1) a^2-2a +1=
2)4a^2- 9b^2=
3)x^2-16y^2=
4)9x^2 +6x+1=
5) 25b^2-49x^2=
6)3a^2-12b^2=
7)2x^2+4x+2=
8)a-3b-2a+6b=
9)4a^2-3=
10)x^2+y^2-2xy
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Answers & Comments
2)(2a-3b)(2a+3b)
3)(1-4у)(1+4y)