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2) x^2-6x+9
3)x^2+14x+49
4)x^2-2x+1
5) x^2-4x+4
6)16x^2-24x +9
7) x^2-10x+25
8) x^2-12x+36
9) x^2+2x+1
10) 9x^2+30x+25