2. Polynomials
medium

યોગ્ય નિત્યસમનો ઉપયોગ કરી, નીચેનાની કિંમત મેળવો.

$101 \times 102$

A

$10302$

B

$10002$

C

$10702$

D

$5002$

Solution

$101 \times 102=(100+1)(100+2)$

Now, using identify $(x+a)(x+b)=x^{2}+(a+b) x+a b,$ we have

$(100+1)(100+2)=(100)^{2}+(1+2) 100+(1)(2)$

$=10000+(3) 100+2=10000+300+2$

$=10302$

Standard 9
Mathematics

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