8
विस्तार सूत्रे
(a+b)³=a³+3a²b+3ab²+b³
(a-b)³=a³-3a²b+3ab²-b³
1)विस्तार करा.101³
उकल (101)³
=(100+1)³
=100³+3×100²×1+3×100×1²+1³
=1000000+3×10000×1+300×1+1
=1000000+30000+300+1
=1030301
2)विस्तार करा 198³
उकल 198³
=(200-2)³
=200³-3×200²×2+3×200×2²-2³
=8000000-3×40000×2+600×4-8
=8000000-3×80000+2400-8
=8000000-240000+2400-8
=8002400-240008
=77,62,392