Question

what time s the sum and difference of
$203 \times 302 \: \: \: and \: 197 \times 298$
​

Answer 1

Step-by-step explanation:

1. 39991
2. 203×197=(200+3)×(200−3)
4. Applying the formula (a+b)(a−b)=a
5. 2
6. −b
7. 2
8. , where a=200,b=3
10. 203×197=(200+3)×(200−3)=200
11. 2
12. −3
13. 2
14. =40,000−9=39991