Posted by suie on Tuesday, February 5, 2013 at 8:48pm.
x^3e^x  4e^x =0

precalculus  Damon, Tuesday, February 5, 2013 at 9:01pm
e^x (x^3  4) = 0
e^x = 0
x = oo
x^3 = 4
x = 4^(.333....)
Not sure if you do complex arithmetic
360/3 = 120
if so you also have two complex roots
one at +120 degrees and one at  120
x = r (cos 120 + i sin 120)
x = 4^(1/3) ( .5 + i sqrt3/2)
x = 4^.3333...(.5)(1+isqrt 3)
and the other is
x = 4^.3333...(.5)(1isqrt 3)

precalculus  suie, Tuesday, February 5, 2013 at 9:03pm
but the answers are 0,2,2

precalculus  Reiny, Tuesday, February 5, 2013 at 9:36pm
If the equation is as you typed my money is riding with Damon.
Your answers don't even come close to satisfying the equation.

precalculus  suie, Tuesday, February 5, 2013 at 9:52pm
are u sure b/c the answers are from the book
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