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Question
विस्तार करा.
(2m − 5)3
Sum
Solution
आपल्याला ठाऊक आहे कि,
(a − b)3 = a3 − 3a2b + 3ab2 − b3
(2m − 5)3
= `(2m)^3 - 3 xx (2m)^2 xx (5) + 3 xx (2m) (5)^2 - (5)^3`
= `8m^3 - 3 xx 4m^2 xx 5 + 3 xx 2m xx 25 - 125`
= `8m^3 - 60m^2 + 150m - 125`
`(2m − 5)^3 = 8m^3 - 60m^2 + 150m - 125`
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