1 х^2 - 60x +90
2. у^2 + 12y+36
3. 4a^2-18a+2,25
4.9A^2 +90A+ 25
5.1/4b^2 -10b +100
6.4c^2/9+ c+9/16
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1 х^2 - 60x +90
2. у^2 + 12y+36
3. 4a^2-18a+2,25
4.9A^2 +90A+ 25
5.1/4b^2 -10b +100
6.4c^2/9+ c+9/16