Answer:
I'm not sure what the question is. I don't see an "=" sign, so I'll assume this is simply an expression and we are asked to factor it.
(4x+5)(3x+4)
Explanation:
(4x+5)(3x+4) = 12x^2 + 31x + 20
If the equation is = 0, the solutions are x = -(3/4) and x = -(5/4)