WAEC - Mathematics (2019 - No. 4)
Simplify, correct to three significant figures, (27.63)\(^2\) - (12.37)\(^2\)
614
612
611
610
Paliwanag
(27.63)\(^2\) - (12.37)\(^2\)
= (27.63 + 12.37)(27.63 - 12.37)
= 40 x 15.26
= 610
(27.63)\(^2\) - (12.37)\(^2\)
= (27.63 + 12.37)(27.63 - 12.37)
= 40 x 15.26
= 610