Question

coefficient of & in expension
15​

Answer 1

Answer:

When a binomial is raised to whole number powers, the coefficients of the terms in the expansion form a pattern. These expressions exhibit many patterns: Each expansion has one more term than the power on the binomial. The sum of the exponents in each term in the expansion is the same as the power on the binomial.

i hope it's help for u

Answer 2

Answer:

I think 15 is the coefficient