Which could be the entire interval over which the function, f(x), is positive?
O (-infinity, 1)
O (-2, 1)
O (-infinity,0)
O (1,4)

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

a long term investor

step-by-step explanation:

because he is a long term investor