​solve
Q. What is the value of the expression  18 . 26 2   -   11 . 74 2 28 . 41   +   36 . 79 ?
     A) 1

     B) 3

     C) 10

     D) 30

Dear student
18.262-11.74228.41+36.79=18.26+11.7418.26-11.7428.41+36.79   a2-b2=(a-b)(a+b)=30×6.5265.2=30×65210065210=3×65210×10652=3
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