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Question

When divided by x3 the polynomials x3px2+x+6 and 2x3x2(p+3)x6 leave the same remainder. Find the value of p.

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Solution

The Remainder is same whne (x3) divides (x3px2+x+6) & (2x3x2(p+3)x6)
Using Remainder Theorem
R(3)=x3px2+x+6
=33p(32)+3+6
=279p+3
=369p

R(3)=2x3x2(p+3)x6
=2(33)32(p+3)36
=2×2793p96
=54243p
=303p

Remainder are same
369p=303p

3630=3p+9p

6=6p

1=p

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