PDA

View Full Version : Finding x-intercepts for why = 3x^3 - 11x^2 - 4x + 11


rjauregui
Oct 3, 2010, 07:15 PM
When y is set to zero, what are the intercepts for X? There should be three.

Unknown008
Oct 3, 2010, 10:00 PM
Yes, there should be three usually, but not always.

y = 3x^3 - 11x^2 -4x + 11

And this polynomial cannot be easily factorised... there are no simple exact solutions.

See for yourself:

The solutions are:
x = -1.04
x = 0.941
x = 3.76

All rounded to 3 significant figures.

Or maybe you inserted a mistake in your question?