Question
$197 \times 203$
✓
Answer
Here, we will use the identity $(a-b)(a+b)=a^2-b^2$
Let us consider the following expression:
$197 \times 203$
$\because \frac{197+203}{2}=\frac{400}{2}=200$, therefore, we will write the above product as:
$197 \times 203$
$=(200-3)(200+3)$
$=(200)^2-(3)^2$
$=40000-9$
$=39991$
Thus, the answer is 39991
Let us consider the following expression:
$197 \times 203$
$\because \frac{197+203}{2}=\frac{400}{2}=200$, therefore, we will write the above product as:
$197 \times 203$
$=(200-3)(200+3)$
$=(200)^2-(3)^2$
$=40000-9$
$=39991$
Thus, the answer is 39991
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