Question:
The value of \[ 249^2-248^2 \] is
(a) 1
(b) 477
(c) 487
(d) 497
Solution:
\[ 249^2-248^2 \]
\[ =(249-248)(249+248) \]
\[ =1 \times 497 \]
\[ =497 \]
\[ \boxed{497} \]
The value of \[ 249^2-248^2 \] is
(a) 1
(b) 477
(c) 487
(d) 497
\[ 249^2-248^2 \]
\[ =(249-248)(249+248) \]
\[ =1 \times 497 \]
\[ =497 \]
\[ \boxed{497} \]