1. factor the expression 36a^4b^10-81a^16b^20 using the two different techniques listed for parts 1(a) and 1(b). (a) factor the given expression using the gcf monomial. (b) factor the given expression using the difference of squares

the expression given is :

→ factor of 36 = 2 ×2×3×3 ×a×a×a×a×b×b×b×b×b×b×b×b×b×b

→ factor of = 3 × 3×3×3 ×

common factor i.e g c f= 3 × 3 ×

                                            = 9

(b)

using [a² - b²= (a-b)(a+b)]

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.

17 1/3

step-by-step explanation: