Find the factors of function f f(x) = x^4 – 5x^3 – 4x^2 + 20x
Based on the factors, which statement is true about the graph of function f?

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

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2