`5 3/x xx 3 1/2=19` then `x=`

If * represents a number then the value of * in 5(3)/(**) xx 3 (1)/(2) = 19 is :

If (x-1)(x-2)=x^(3)+ax^(2)+bc+5 xx 2 xx 1 then c will be

If (3^(5x)xx81^2xx6561)/(3^(2x))=3^7 , then x=

(3^(5x)xx81^(2)xx6561)/(3^(2x))=3^(7), then x=

If alpha and beta are the roots of the equation, [1,5][(1,3),(-4,7)]^(2)[(7/19, -13/19),(4/19,1/19)]^(4) [(1,3),(-4,7)]^(2)[(x^2 - 5x + 5),(-3)] = [-4] , then the value of (2 - alpha)(2 - beta) is

If (3^(5x)\ xx\ 81^2\ xx\ \ 6561)/(3^(2x))=3^7, then x= (a)\ 3 (b) -3 (c) 1/3 (d) -1/3

If 1xx2xx3=36 and 2xx3xx4=81 , then 1 X 2 X 5 = ?