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If \((x - 3)\) is a factor of \(2x^{3} + 3x^{2} - 17x - 30\),...

Further Mathematics
WAEC 2006

If \((x - 3)\) is a factor of \(2x^{3} + 3x^{2} - 17x - 30\), find the remaining factors.

  • A. (2x - 5)(x - 2)
  • B. (2x - 5)(x + 2)
  • C. (2x + 5)(x - 2)
  • D. (2x + 5)(x + 2)
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Correct Answer: Option D
Explanation

Divide \(2x^{3} + 3x^{2} - 17x - 30\) by \((x - 3)\). You get \(2x^{2} + 9x + 10\).

Factorizing, we have \(2x^{2} + 9x + 10 = 2x^{2} + 4x + 5x + 10\)

\(2x(x + 2) + 5(x + 2)\)

= \((2x + 5)(x + 2)\)


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Project Topics and Materials, Post-UTME past questions - Download now or upload yours to get paid
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Project Topics and Materials, Post-UTME past questions - Download now or upload yours to get paid
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789