Find the area of a rectangle if length = 2a + b and breadth = 3a + c

6a^2+2ac+3ab+b^2

Step-by-step explanation:

Given

length=2a+b

breadth=3a+c

Now,

Area=?

We know,

Area=l*b

(2a+b)*(3a+c)

2a(3a+c)+b(3a+c)

6a^2+2ac+3ab+b^2

You can use formula (a+b)^2

a^2+2ab+b^2

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.

false

step-by-step explanation: