plz solve 8th question... help me its urgent. .
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64x^3-125z^3 = (4x)^3-(5z)^3
a^3-b^3 =(a+b)^3-3ab(a+b)
(16)^3-3×12(16)
4096-36(16)
4096-576
3520
frozenelsa:
sorry ....ur answer is wrong...
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in 9th line .....mistake..... write 16 in place of 4 and 25 in place of 5 :)
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I have done a very small mistake in the sum which I have already mentioned but I hope you got the way how to do this type of sums thank you
ok
thanks to u
but i m not getting identity..
becs this identity is not there in my..course.
oh
cbse u
??
yess
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