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Question

(x+1)2x3+x=
  1. 1x+2x2+1
  2. 1x+1x2+1
  3. 1x1x2+1
  4. none

A
1x+2x2+1
B
1x+1x2+1
C
1x1x2+1
D
none
Solution
Verified by Toppr

(x+1)2x3+x=x2+2x+1x(x2+1)=(x2+1)+2xx(x2+1)=x2+1x(x2+1)+2xx(x2+1)=1x+2x2+1

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