Question: n 1. (6 marks) Recall the Binomial Formula (a + b) = ) n akbn- for n E N. It can be re-written as k

n 1. (6 marks) Recall the Binomial Formula (a + b)" = ) n akbn- for n E N. It can be re-written as k K=0 ( atb ) n = n ab , it j=n i j n n! with i, j 2 0 and = i!j! The Trinomial Formula is then (a + b + c)" = n i j . a'b'ck , with itjth=n i j k n n! i, j, k 2 0 and i j k i!j!k! A. Find the coefficient of a yo 2 in the expansion of (2x - 3y + 22 )10. SHOW your work! B. Find the coefficient of a 2 in the expansion of (3x - x2 + 2 1 ) 10. SHOW your work

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