A developer is building a privacy fence bordering a highway for a new subdivision. The height, hn, in feet of each fence post, n, will gradually decrease according to the
pattern shown in the table. Which equation can be used to find the height, h10, of the
tenth fence post?

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

fwms@lil_ben06

step-by-step explanation:

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