Answer:
(2x+1)(3x+4)
Explanation:
 6x² + 11x + 4
 multiply the first and last term 
 i.e (6x²)(4) = 24x²
find two terms that multiplies to give 24x² and when added would give 11x
 ¶ 8x and 3x
Therefore; 6x² + 11x + 4
 6x² + 8x + 3x + 4
 2x(3x + 4) + 1(3x + 4)
 Answer; (2x + 1)(3x + 4)