3 For the compensation D(s) = 25 s + 1 s + 15 use Euler’s forward rectangular method to determine the difference equations for a digital implementation with a sample rate of 80Hz. Repeat the calculations using the backward rectangular method and compare the difference equation coefficients.

for FRR method the difference equation is given by:

u(k+1)=0.8125u(k)+(-24.68)e(k)+25e (k+1)

Step-by-step explanation:see the pictures attached

the correct answer option is (2x-3)(2x+3).

step-by-step explanation:

we are given the following expression and we are to factorize it:

we are to find such factors that when multiplied they give a result of 36 (9 x 4 = 36) and when added they give a result of 0.

the two such factors of 36 are negative six and postive six.

factorizing the given expression to get:

therefore, the correct factorization of is (2x-3)(2x+3).