Evaluate the following using appropriate identies : (49)cube and (999)cube
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(49)^3=(50-1)^3
= (a-b)^3
=a cube - b cube- 3ab(a-b)
=(50)^3-(1)^3-3×50×1(50-1)
=12500-1-150(49)
=6117601
999 cube =1000-1 cube
=1000 cube-1 cube- 3×1000×1(1000-1)
=1000000000-1-3000(999)
=999996999(999)
now u can calculate pls mark it as brainliest
= (a-b)^3
=a cube - b cube- 3ab(a-b)
=(50)^3-(1)^3-3×50×1(50-1)
=12500-1-150(49)
=6117601
999 cube =1000-1 cube
=1000 cube-1 cube- 3×1000×1(1000-1)
=1000000000-1-3000(999)
=999996999(999)
now u can calculate pls mark it as brainliest
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