algebraic expression?

Rebecca

New member
I need help multiplying out the following expression:

C(Z) =

0.1(Z+0.5)
----------------------
(Z-1)(Z-0.2)
----------------------------------------…
1 + 0.1(Z+0.5) x 0.2Z
------------------ -----------
( Z-1)(Z-0.2) (Z-0.8)

After I have multiplied out this expression I am supposed to do the equation:

E(Z) = 1- C(Z)

The correct answer for E(Z) on the problem sheet is:

Z^3 - 2.08^Z2 + 1.2Z - 0.12
--------------------------------------
Z^3 - 1.98Z^2 + 1.17Z - 0.16

Could someone show me the step by step for this question so I know how to answer the rest of them. Thanks
 
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