WAEC Mathematics 2022 Objective — Question 10
Question 10 of 50 from the West African Examinations Council (WAEC) Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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If a = 3, and b = −7, find the value of [5b+(a+b)²]/(a−b)².
- A. 0.51
- B. 0.19
- C. −0.19Correct
- D. −0.51
Explanation
5b+(a+b)² = 5(−7)+(3+(−7))² = −35+16 = −19. (a−b)² = (3−(−7))² = 100. Result = −19/100 = −0.19.
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