2. Polynomials
easy

યોગ્ય નિત્યસમનો ઉપયોગ કરીને કિમંત મેળવો : $(998)^{3}$

A

$988411902$

B

$994011992$

C

$989012392$

D

$994012092$

Solution

$998 =1000-2 $

$(999)^{3} $

$=(1000-2)^{3}$

$=(1000)^{3}-(2)^{3}-3(1000)(2)[1000-2]$

$=1000000000-8-6000[1000-2]$

$=1000000000-8-6000000-12000$

$=994011992$

Standard 9
Mathematics

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