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plz solve it step by step

i want to understand it

(5.5)^3-(4.5)^3

 Oct 24, 2019
edited by Guest  Oct 24, 2019
 #1
avatar+104969 
+2

(5.5)^3  - (4.5)^3

 

We have a difference of cubes.........we can simplify this as follows

 

(5.5 - 4.5) ( 5.5^2   + 5.5*4.5  + 4.5^2 )   =

 

( 1)  ( 30.25  + 24.75  + 20.25)  =

 

(1)  (  75.25)   =

 

75.25

 

 

cool cool cool

 Oct 24, 2019

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