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1)c ^{2} -2 cm+m^{2}= (c-m)^{2}
2)9+6c+c^{2} = (3+c)^{2}
3)81 c^{2} -36cm+ 4m^{2}= (9-2m)^{2}
4)25c^{2}+10mc+m^{4}=(5+m^{2} )^{2}
2.
![frac{ 29^{2}+2 * 29*21 +21^{2} }{26^{2}- 24^{2} }= frac{(29+21)^{2} }{(26-24)(26+24)} = frac{50^{2} }{2*50}= frac{2500}{100} =25
frac{ 29^{2}+2 * 29*21 +21^{2} }{26^{2}- 24^{2} }= frac{(29+21)^{2} }{(26-24)(26+24)} = frac{50^{2} }{2*50}= frac{2500}{100} =25](https://tex.z-dn.net/?f=+frac%7B+29%5E%7B2%7D%2B2+%2A+29%2A21+%2B21%5E%7B2%7D++%7D%7B26%5E%7B2%7D-+24%5E%7B2%7D++%7D%3D+frac%7B%2829%2B21%29%5E%7B2%7D+%7D%7B%2826-24%29%2826%2B24%29%7D+%3D+frac%7B50%5E%7B2%7D+%7D%7B2%2A50%7D%3D+frac%7B2500%7D%7B100%7D+%3D25+%0A)
2)9+6c+c^{2} = (3+c)^{2}
3)81 c^{2} -36cm+ 4m^{2}= (9-2m)^{2}
4)25c^{2}+10mc+m^{4}=(5+m^{2} )^{2}
2.
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