Given the polynomial function below, find f(-9). f(x)=-x^2-10x-2

ANSWER

EXPLANATION

The given function is

To find f(-9), we substitute x=-9 into the function to obtain:

Simplify:

Simplify further;

6 spoons of sugar for every 21 cups of flour

step-by-step explanation:

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