+0  
 
+1
269
5
avatar+3853 

Help.

NotSoSmart  Sep 19, 2017
 #1
avatar+91360 
+2

l  -4b  - 8 l  +   l  -1  - b2 l + 2b3, b  = -2

 

So we have

 

l  -4 (-2) - 8 l   +  [  -1 - (-2)2 l  + 2 (-2)3   =

 

l  8 - 8  l   +  l  -1 - 4 l  + 2 (-8)  =

 

l 0 l   +  l  -5 l   -  16  =

 

0  +  5   - 16  =

 

5 - 16

 

-11

 

 CORRECTED ANSWER  !!!!!

 

 

cool cool cool

CPhill  Sep 19, 2017
edited by CPhill  Sep 19, 2017
 #2
avatar+3853 
+1

Thank you!!

NotSoSmart  Sep 19, 2017
 #3
avatar
0

CPhill: The expression begins with - 4b not +4b. The answer should be = -11.

Guest Sep 19, 2017
 #4
avatar+91360 
+1

Thanks...I have made the correction!!!!!

 

 

cool cool cool

CPhill  Sep 19, 2017
 #5
avatar+3853 
0

Thanks!!

NotSoSmart  Sep 19, 2017

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