3 years ago

Find the exact roots of the polynomial; write the roots in simplest radical form, if necessary.

1 answer:

8 0

I can see that 2 is a root but not 1? So I tried -1 by substitution and that works.

So to work out the 3rd root we just use the sum and product of roots theorem.

We have the sum of the roots = 11/7 and from there the third root is 4/7

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