What is the standard form of (7-5i)(2+3i)
A. 29+11i
B. -29+11i
C. -11+29i
D. 11-29i

A

Step-by-step explanation:

(7-5i)(2+3i)= 7*(2+3i) - 5i*(2+3i)

= 7*2 + 7*3i - 5i*2 - 5i*3i

= 14 + 21i -10i  - 15i²                 {i² = -1}

= 14 + 21i - 10i -15*(-1)

= 14 + 11i + 15

= 29 + 11i

One such situation is the amount of money in excess you paid for an item and the amount of change you will get. Another such scenario would be the total numbers of hours with respect to the total number of days. With more days, there will be more time hence more hours.

Step-by-step explanation: