Julio is an architect who designs skyscrapers. assume that each story (also called a "floor" or "layer") of a new building is
15 fær high as you julio answer the following questions. homework
a. how high would a two-story building be? what about a 10-story building? what about a 30-story building?
b. if julio had to design the building to be 750 feet tall, how many stories should the building have?

answer: (x+2) (x+3) are the binomials for your question : )

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81

answer: 1 box of pens at the store ? ? pens in the box