Question

if sum of two numbers is 490 and the difference between their square is 4900,the smaller number is​

Answer 1

Let the two numbers be x and 1000-x;

so x²-(1000-x)²=256000

x²-1000000+2000x-x²=256000

x=1256000/2000=628

Therefore the numbers are 628 and 372.

4.7