Answer:
5(x+4)(x+8)
Step-by-step explanation:
5x^2+60x+160
factor out the 5 first,
5(x^2+12x+32),
then factor out the trinomial,
find 2 numbers that when they multiply,
you get the third term, which is 32 in this case,
and when they add up,
you get the second term, which is 12 in this case.
5(x+4)(x+8)
