Question 149363
Instead of simplify, I think you mean factor. 
{{{3x^2-22x+7=(3x+a)(x+b)}}}
Where {{{a*b=7}}} and {{{a+3b=-22}}}.
Let's try a=-1, b=-7.
That satisfies both conditions.
{{{3x^2-22x+7=(3x-1)(x-7)}}}