Advertisements
Advertisements
Question
Expand.
(198)3
Sum
Solution
`(198)^3`
`= (200 - 2)^3`
`= (200)^3 - 3 xx (200)^2 xx 2 +3 xx 200 xx (2)^2 - (2)^3`
`= 8000000 - 6 xx 40000 + 600 xx 4 - 8`
`= 8000000 - 240000 + 2400 - 8`
`= 8000000 + 2400 - 240000 - 8`
`= 8002400 - 240008`
`= 7762392`
`therefore(198)^3 = 77,62,392`
shaalaa.com
Is there an error in this question or solution?
