Without actually calculating the cubes, find the value of 45^3 - 25^3 - 20^3URGENT!!!!
kushagra191:
here
since a plus b plus c =0 this implies that a cube + b cube + c cube is equal to three abc
thus the ans. is 45X25X-20
refer NCERT for mathematics class 9 ch-polynomials
Answers
Answered by
6
according to the question 45³ - 25³ - 20³. Without actually calculating squares and cubes we do as: a³ - b³ = (a+b)(a²+b²+ab) (45-25)(45²+25²+ 45*25) - 20³ 20 (45²+25²+45*25) - 20³.
Answered by
2
The value of 45^3-25^3-20^3=67500
Hope this will help you
Hope this will help you
I don't want to calculate I want to do it using formula
it will be in this formula: a^3-b^3
are
without calculating cubes
this means you do not have to calculate the.cubes
3abc will work
betcha
since when a plus b plus c equals zero then a cube plus b cube plus c cube equals 3abc
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