WAEC Mathematics questions: Polynomials

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

1. Question 21· Polynomials· WAEC

   Solve simultaneously: x + y = 7 and x − y = 1.

   • Ax = 3, y = 4
   • Bx = 4, y = 3
   • Cx = 5, y = 2
   • Dx = 6, y = 1

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   Explanation and discussion

2. Question 22· Polynomials· WAEC

   Find the remainder when x³ − 2x² + 4 is divided by x − 2.

   • A−4
   • B0
   • C8
   • D4

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   Explanation and discussion

3. Question 23· Polynomials· WAEC

   Expand (3x + 2)².

   • A9x² + 12x + 4
   • B9x² + 4
   • C9x² + 6x + 4
   • D3x² + 12x + 4

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   Explanation and discussion

4. Question 24· Polynomials· WAEC

   Solve the equation x² − 5x + 6 = 0.

   • Ax = −1 or 6
   • Bx = −2 or −3
   • Cx = 1 or 6
   • Dx = 2 or 3

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   Explanation and discussion

5. Question 25· Polynomials· WAEC

   Expand (3x + 2)(x − 4).

   • A3x² − 10x − 8
   • B3x² + 10x − 8
   • C3x² − 14x − 8
   • D3x² − 10x + 8

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   Explanation and discussion

6. Question 26· Polynomials· WAEC

   Make r the subject of V = πr²h.

   • Ar = √(V/πh)
   • Br = V/πh
   • Cr = √(Vπh)
   • Dr = πh/V

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   Explanation and discussion

7. Question 27· Polynomials· WAEC

   Solve the equation 3x − 7 = 2x + 5.

   • A−12
   • B−2
   • C2
   • D12

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   Explanation and discussion

8. Question 28· Polynomials· WAEC

   Solve 5x + 3 = 2x − 9.

   • A2
   • B4
   • C−2
   • D−4

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   Explanation and discussion

9. Question 29· Polynomials· WAEC

   Expand (x + 3)(x − 2).

   • Ax² + 5x − 6
   • Bx² − x − 6
   • Cx² + x − 6
   • Dx² − x + 6

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   Explanation and discussion