JAMB Mathematics questions: Polynomials

28 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Polynomials· JAMB

   Solve 3x² − 7x + 2 = 0.

   • Ax = 1/3 or x = 2
   • Bx = −1/3 or x = −2
   • Cx = 3 or x = 1/2
   • Dx = 2/3 or x = 1

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2. Question 22· Polynomials· JAMB

   Factorise x² + 7x + 12.

   • A(x − 3)(x − 4)
   • B(x + 2)(x + 6)
   • C(x + 1)(x + 12)
   • D(x + 3)(x + 4)

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3. Question 23· Polynomials· JAMB

   Find the remainder when 2x³ + 3x² − x + 5 is divided by (x + 1).

   • A3
   • B9
   • C7
   • D−7

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4. Question 24· Polynomials· JAMB

   If (x − 1) is a factor of x³ + kx² − 4, find k.

   • A5
   • B−3
   • C4
   • D3

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5. Question 25· Polynomials· JAMB

   Factorise 10x² + 11x − 6.

   • A(5x + 2)(2x − 3)
   • B(5x − 2)(2x + 3)
   • C(10x − 3)(x + 2)
   • D(5x + 3)(2x − 2)

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6. Question 26· Polynomials· JAMB

   α and β are the roots of x² − 6x + 4 = 0. Find α² + β².

   • A32
   • B36
   • C44
   • D28

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7. Question 27· Polynomials· JAMB

   Find the positive value of k for which x² + kx + 9 is a perfect square.

   • A6
   • B3
   • C9
   • D18

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8. Question 28· Polynomials· JAMB

   Find the sum of the roots of 3x² − 12x + 5 = 0.

   • A12
   • B−4
   • C5/3
   • D4

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   Explanation and discussion