Without actually calculating the cubes find the value of 45 cube minus 25 cube minus 20 cube
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45 ³ — 25³ - 20³
= (50 - 5)³ - (50-25)³ - (50-20)³
By using the equation
(a - b) ³ = a³ - b³ + 3 ab (a-b)
In all the cases and at last the answer would be
67500
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= (50 - 5)³ - (50-25)³ - (50-20)³
By using the equation
(a - b) ³ = a³ - b³ + 3 ab (a-b)
In all the cases and at last the answer would be
67500
Bye
Hope you liked it
Mark me Mark me
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