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When the expression pm\(^2\) + qm + 1 is divided by (m - 1), it...

Mathematics
JAMB 1998

When the expression pm\(^2\) + qm + 1 is divided by (m - 1), it has a remainder is 2, and when divided by (m + 1), the remainder is 4. Find p and q respectively

  • A. 2, -1
  • B. -1, 2
  • C. 3, -2
  • D. -2, 3
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Correct Answer: Option B
Explanation

pm\(^2\) + qm + 1 = (m - 1) Q(x) + 2, where Q(x) = remainder.

p(1)\(^2\) + q(1) + 1 = 2

p + q + 1 = 2

p + q = 1.....(i)

pm\(^2\) + qm + 1 = (m - 1)Q(x) + 4

p(-1)\(^2\) + q(-1) + 1 = 4

p - q + 1 = 4

p - q = 3....(ii)

p + q = 1, p - q = -3

2p = -2, p = -1

-1 + q = 1

q = 2


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JAMB CBT Software 2025 - Free Download
JAMB CBT 2025 - Candidates, Schools, Centres, Resellers - Get Ready!
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
JAMB CBT 2025 - Candidates, Schools, Centres, Resellers - Get Ready!
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
JAMB CBT Mobile App 2025 - Free Download
JAMB CBT Software 2025 - Free Download