Just retype the polynomial .
Sn: I don’t know how to do this I need help please !

39 n^10 - 26 n^5 - 15n^3 - 4

Step-by-step explanation:

39 n^10 - 26 n^5 - 15n^3 - 4

There are no common factors

39 = 3*13

26 = 2*13

15 = 3*5

4 = 2*2

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4