If the term independent of x in the expansion of 32x2-13x9 is k then 18kis equal to ;

The given binomial expansion is 32x2-13x9 If the term independent of x in the expansion of axp+bxqn is (r+1) then r=npp+q Hence, r=9(2)2+1=6 Hence, the term independent of x is k= 9C6323−136=718 Therefore, 18k=7