What is the simplest form of (4x^3 + 6x - 7) + (3x^3 - 5x^2 - 5x + 9)

Simplest form:

7 x^3 − 5 x^2 + x + 2

The correct option is B.

Step-by-step explanation:

Total possible digits are 0,1,2,3,4,5,6,7,8,9.

Total number of digits in a credit card = 16

It is given that that the last digit of credit card is fixed.

Total number of possible ways for 16th digit = 1

U-Kan-Trust-Us Credit Card numbers begin with 61, 62, or 63.

Total number of possible ways for first two digits = 3

Remaining places = 16 - 1 - 2 = 13

In these 13 remaining places any of 10 digits can be occur.

Total number of possible ways for remaining 13 digits =

The maximum number of credit cards that UKTU can issue is

Therefore the correct option is B.