Question

use the binomial theorem to expand the binomial

(x-5)^6

Answer 1

row 6 is

1 6 15 20 15 6 1

1 x^6 -5^0 = x^6
6 x^5(-5)^1 = -30x^5
15 x^4(-5)^2 = 15*25 x^4 = 375 x^4
20 x^3 (-5)^3 = 20*-125 x^3 = -2500 x^3
etc then add them up