EXPAND===↓↓↓↓
1. (k + 4)³
2. (7x + 8y)³
FAST........
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1. (K)cube+(4)cube+k square×4+ k×4square.
= k cube + 64+ 12k square +48 k ANS....
2. (7x)cube+(8y)cube+7xsquare×8y+7x×(8y)square
=343x cube+512y cube+1176x square y +1344xy square ANS...
Hope it helps u!!!
= k cube + 64+ 12k square +48 k ANS....
2. (7x)cube+(8y)cube+7xsquare×8y+7x×(8y)square
=343x cube+512y cube+1176x square y +1344xy square ANS...
Hope it helps u!!!
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