If the area of Bianca’s rectangular backyard patio is represented by the expression x2 – 18x + 81, and the length of the patio is represented by the expression x − 9:
1. what is the expression for the width of the patio? Explain and show all work.
2. what special rectangular shape is the patio? (can be determined by side lengths).
Explain and show all work.

1)

2) Rectangular shape is square shape patio !

Step-by-step explanation:

Here we have ,  the area of Bianca’s rectangular backyard patio is represented by the expression x2 – 18x + 81, and the length of the patio is represented by the expression x − 9: We need to find

1. what is the expression for the width of the patio? Explain and show all work.

We know that area of rectangle =

⇒

Factorizing RHS:

⇒

⇒

⇒

⇒

2. what special rectangular shape is the patio?

Now , we see that

A rectangle whose length & width are equal is known as a square ! Hence ,  Rectangular shape is square shape patio !

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

fwms@lil_ben06

step-by-step explanation: