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  1. On simplification of  
    (2.644)2 − (2.356)2
    		   we get :
    0.288
    1. 1
    2. 4
    3. 5
    4. 6
Correct Option: C

? =  
(2.644)2 − (2.356)2
0.288

=
(2.644 − 2.356)(2.644 + 2.356)
0.288

=
0.288 × 5
 = 5
0.288

Second Method :
(2.644)2 − (2.356)2
0.288

=
(2.644)2 − (2.356)2
(2.644 − 2.356)

= (2. 644 + 2.356) = 5


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