5s^2 + 19s - 4
a=5
b=19
c=-4
a*c=-20
5s^2 + 20s - 1s - 4
What do i do now?
Factoring Trinomials where "a" does not equal 1

Question

5s^2 + 19s - 4 
a=5 
b=19 
c=-4
a*c=-20
5s^2 + 20s - 1s - 4
What do i do now? 
Factoring Trinomials where "a" does not equal 1

ybarrap · Answer

$$(s + 4)(5s - 1)$$

anonymous · Answer

you can always use the quadratic formula to find the roots, then write it in the factored form as above.

But, I assume you are looking for a quick way to factor without using the quadratic formula.

anonymous · Answer

I need a refresher on this stuff myself :) http://www.purplemath.com/modules/factquad.htm you're asking about this case: http://www.purplemath.com/modules/factquad2.htm http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut7_factor.htm

anonymous · Answer

I've been trying the method described here - and it's great and really fast ! http://www.purplemath.com/modules/factquad2.htm check it out !