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WAEC Mathematics 2022 Question 10

Question 10

Algebraic Expressions

If a = 3 and b = −7, find the value of (5b + (a + b)2)/(a − b)2

  1. A.0.51
  2. B.0.19
  3. C.−0.19
  4. D.−0.51
Show the answer and explanation

Answer: C (−0.19)

Explanation

Top: 5(−7) + (−4)2 = −35 + 16 = −19. Bottom: (10)2 = 100. So the value is −0.19.