1)=0,36b^8+4/5b^4a^2+4/9b^4
2)=4/9a^6b^8-4/5a^8b^5+9/25a^10b^2
3)=25/36m^6n^6+5/6m^5n^5+1/4m^4n^4
|АВ| = √9 + 16 = √25 = 5
|BC| = √9 + 16 = √25 = 5
|AC| = √81 = 9
AB = BC = 5 - треугольник ABC равнобедренный,
P = AB + BC + AC = 25 + 9 = 36
1)
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<var> D=64+132=196 </var>
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2)
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<var>D=144-144=0 </var>
3)
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<var> D=2,56+1,44=4</var>
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4) 
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<var />
<var>D=0,16+5,6=5,76 </var>
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5) 
<var> D=361-240=121 </var>
6)
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<var>D=25+1200=1225 </var>
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Lg(x-3)-lg(71x)=lg3
(x-3)/71x=3
x-3=71x*3
x-3=213x
212x=-3
x=-3/212
