JAMB - Mathematics (1979 - No. 4)

(3.2)2 - (1.8)2 equals
7.0
2.56
13.48
2.0
0.07

Explanation

(3.2)2 - (1.8)2 = (3.2 + 1.8)(3.2 - 1.8)

= 5 x 1.4

= 7

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