+0  
 
0
7
2
avatar+8 

Let
f(x)=(x-1)(x-3)(x+5)+72

 

Find the sum of all values of x such that f(x)=72 .

 Mar 31, 2024
 #1
avatar+1071 
+1

The values of x that work are 1 and 3, so the answer is 1 + 3 = 4.

 Mar 31, 2024
 #2
avatar+128794 
+1

f(x) =  72

 

(x - 1) ( x - 3 ) ( x + 5)  +  72   =  72

 

(x -1) ( x -3) ( x +5) =  0

 

x =  1, 3,  -5

 

Sum =  -1

 

cool cool cool

 

 Apr 1, 2024

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