1) = a^2+2ax+x^2
2) = a^2-10a+25
3) = 49-14a+a^2
4) = z^2+6z+9
5) = 64-16n+n^2
6) = 36x^2-36x+9
7) = 25x^2-30ax+9a^2
8) = 36y^2+24yz+4z^2
9) = (x-2)(x^2+2x+4)
10) = (2a-3)(4a^2+6a+9)
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Answers & Comments
1) = a^2+2ax+x^2
2) = a^2-10a+25
3) = 49-14a+a^2
4) = z^2+6z+9
5) = 64-16n+n^2
6) = 36x^2-36x+9
7) = 25x^2-30ax+9a^2
8) = 36y^2+24yz+4z^2
9) = (x-2)(x^2+2x+4)
10) = (2a-3)(4a^2+6a+9)
a^2-10a+25
49-14a+a^2