Question 1012995

(mx+4)(2x-5) is simplified to 6x^2+23x-20
What is the value of m?
I forget how to do this. 
<pre>{{{6x^2 + 23x - 20}}} cannot be factored with integers, as there are no 2 integers than MULTIPLY to get - 120 (ac), and SUM to + 23 (b). 
In this case, {{{highlight_green(matrix(3,1,m = 0.730396696,"OR",m = - 4.5637))}}}