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What is the product of 2x2 − x + 1 and 3 − 2x

Mathematics
JAMB 2017
What is the product of 2x2 − x + 1 and 3 − 2x
  • A. 4x3 − 8x2 + 5x + 3
  • B. −4x3 + 8x2 − 5x + 3
  • C. −4x3 − 8x2 + 5x + 3
  • D. 4x3 + 8x2 − 5x + 3
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Correct Answer: Option B
Explanation
(2x2 - x + 1) × (3 - 2x);

3(2x2 - x + 1) - 2x (2x2 - x + 1)

6x2 - 3x + 3 - 4x3 + 2x2 - 2x

-4x3 + 8x2 -5x + 3

There is an explanation video available below.

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Explanation Video

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts