find the value of this
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(2x-3y)³
Using the formula
(a-b)³=a³-b³-3ab(a-b)
(2x-3y)³=8x³-27y³-18xy(2x-3y)
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NOW PUTTING THE VALUE
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(10)³=8x³-27y³-18(16)(10)
1000=8x³-27y³-2880
1000-2880=8x³-27y³
-1880=8x³-27y³
Using the formula
(a-b)³=a³-b³-3ab(a-b)
(2x-3y)³=8x³-27y³-18xy(2x-3y)
====
NOW PUTTING THE VALUE
=====
(10)³=8x³-27y³-18(16)(10)
1000=8x³-27y³-2880
1000-2880=8x³-27y³
-1880=8x³-27y³
Answered by
1
Hope this helps.....
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