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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