7. The value of the polynomial f(x) = 6x³+4x² - at x = 3 (1) (3) 5/94/3 (2) 1 (4) 3/2 is 7. The value of the polynomial f ( x ) = 6x³ + 4x² - at x = 3 ( 1 ) ( 3 ) 5/94/3 ( 2 ) 1 ( 4 ) 3/2 is​