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Expand -(3 - c)(c + 2(3 - c) + 5c - 7).What is the sum of the coefficients of the expanded form?

 Apr 6, 2022
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-(3 -c)  ( c + 2(3-c) + 5c - 7)       =

 

-(3 -c)  ( c +   6 - 2c + 5c - 7)  =

 

-(3 -c) ( 4c - 1)  =

 

(c - 3) (4c -1)  =

 

4c^2 - 12c -1c + 3  =

 

4c^2 -13c  + 3

 

Sum of coefficients  =  4 -13   =  -9

 

 

cool cool cool

 Apr 6, 2022

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