Question

factor the trinomial
25r^2+5r-42

Answer 1

so you have to think of mltiplies of 25 and 42 that would give me 5
25 is 25*1 or 5*5
42is 42*1, 2*21, 3*14,6*7
we look at 5*6=30 and 7*5= 35 then 35-30= 5
ok
(__x __ __) (__x __ __)=(5x__6)(5x__7) so what goes in the blanks minus or plus