Question 764880
Examine several trials.  Lead terms must give 35, end terms must give 4, and only positive signs.


(35+2)(1+2), no
(35+4)(1+1), no
(35+1)(1+4), no
(5+2)(7+2), no
(5+1)(7+4), yes.  ______ 5*4 +1*7=27


FACTORIZATION:______ {{{highlight((5a+1)(7a+4))}}}