(83a-91b)-(89a-100b) (5k+6t)+(2.8t-3.1k)

Question

(83a-91b)-(89a-100b) (5k+6t)+(2.8t-3.1k)

Answer 1

(83a-91b-89a+100b)×

(5k+6t+2.8t-3.1k)

(9b-6a)·(1,9k+8,8t)

17,1kb+79,2bt-11,4ak-52,8at