5.96x * 10 ^ 6 - 7.29x * 10 ^ 5

= 5.96 * 10^6 - 7.29 * 10^5

= 5.96 * 1,000,000 - 7.29 * 100,000
= 5,960,000 - 729,000
= 5,231,000

Answer in scientific notation

5.231x * 10^6