2. Polynomials
medium

$x^{3}+3 x^{2}+3 x+1$ को निम्नलिखित से भाग देने पर शेषफल ज्ञात कीजिए

$x+1$

A

$0$

B

$3$

C

$8$

D

$2$

Solution

$\because $ The zero of $x +1$ is $-1$               $[\because x +1=0 \Rightarrow x =-1]$

And by remainder theorem, when

$p ( x )= x ^{3}+3 x ^{2}+3 x +1$ is divided by $x +1,$ then remainder is $p (-1)$

$\therefore$            $p (-1)=(-1)^{3}+3(-1)^{2}+3(-1)+1$

$=-1+(3 \times 1)+(-3)+1=-1+3-3+1=0$

Thus, the required remainder $=0$

Standard 9
Mathematics

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