Simplify, correct to three significant figures, (27.63)\(^2\) - (12.37)\(^2\)

  • A 614
  • B 612
  • C 611
  • D 610
waec 2019mathematics

The correct answer is D. 610

(27.63)\(^2\) - (12.37)\(^2\) 

= (27.63 + 12.37)(27.63 - 12.37)

= 40 x 15.26

= 610

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