Simplify, correct to three significant figures, (27.63) 2 - (12.37)2
MATHEMATICS
WAEC 2019
Simplify, correct to three significant figures, (27.63)2 - (12.37)2
- A. 614
- B. 612
- C. 611
- D. 610
Correct Answer: D. 610
Explanation
(27.63)\(^2\) - (12.37)\(^2\)
= (27.63 + 12.37)(27.63 - 12.37)
= 40 x 15.26
= 610
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