Question 310513: polynomial in factored form:
-t^3-6t^2+11t+66=
dlbtaw@yahoo.com Found 2 solutions by stanbon, Edwin McCravy:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! polynomial in factored form:
-t^3-6t^2+11t+66=
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I graphed it and found a zero at x = -6
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Use synthetic division to find the other zeroes:
-6....-1....-6....11....66
......-1.....0....11....|..0
Solve -x^2+11 = 0
x = sqrt(11) or x = -sqrt(11)
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cheers,
Stan H.
The other tutor's solution is incorrect:
Factor out from the two red terms:
(Don't forget that when you factor out a negative,
the signs change inside the parentheses!)
Factor out from the two blue terms:
Now I'll do some re-coloring:
Take out the green
That's it! You can make it a tiny bit shorter by
reversing the terms in the second factor:
But that is not necessary. To make the green one
match, you might want to reverse the terms in it too:
and then leave the whole thing black, like this:
But it would be OK just to leave it like we had it above
without the coloring:
Edwin
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