1. x^6 - 16
2. aby^2 + abx -cy^2 - cx
3. x^2 - y^4
4. 9m^4 - 4c^2
5. 36a^6 - 64b^2
6. 25n^8-m^8
1345+1345=2690_________________
<span>9,99-0,99:(99*y-9,9)=9,09;
</span>
0,99:(99*y-9,9)=9.99-9,09;
0,99:(99*y-9,9)=0.9;
99y-9.9=0.99:0.9
99y-9.9=1.1
99y=9.9+1.1
99y=11
y=11:99
y=1/9
0,73х-0,3+9,6=0,73х+9,3
0,73*21+9,3=24,63
0,73*100+9,3=82,3
0,73*0,01+9,3=9,3073