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2. Polynomials
medium
યોગ્ય નિત્યસમનો ઉપયોગ કરીને કિમંત મેળવો : $(99)^{3}$
A
$970270 $
B
$979270 $
C
$990277 $
D
$970299 $
Solution
$99=100-1$
$99^{3} =(100-1)^{3}$
$=100^{3}-1^{3}-3(100)(1)(100-1) $
$=1000000-1-300(100-1)$
$=1000000-1-30000+300 $
$=1000300-30001$
$=970299 $
Standard 9
Mathematics