Monday
May 20, 2013

Homework Help: Alg.2

Posted by Miley on Wednesday, February 13, 2008 at 5:35pm.

find all zeros of the function.

f(x) = x^3-10x^2+33x-34

I found 2, using my calculator. What do i do after that?

• Alg.2 - Damon, Wednesday, February 13, 2008 at 5:54pm

One you have one zero, say x = 5.3 (invented example number)
Then divide the original polynomial by (x-5.3)
That leaves you with a quadratic, which you can solve with your calculator.

• Alg.2 - Miley, Wednesday, February 13, 2008 at 5:58pm

How do i solve the quadratic with my calculator. Thanks so much for your help:)

• Alg.2 - Damon, Wednesday, February 13, 2008 at 7:09pm

if
y = a x^2 + b x + c
then y is zero if
x = -b/2a +or- (1/2a)sqrt(b^2 - 4 a c)

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