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Complete the square: x^2+12x+9.
Enter your answer in the form a(x+u)^2+v, where a, u, and v are replaced by numbers.

 Jan 30, 2021
 #1
avatar+120023 
+1

x^2  +  12x  + 9

 

Take 1/2  of 12  = 6

Square this  = 36

Add and subtract this

 

x^2  + 12x  +  36   +  9   - 36        factor the first three  terms, simplifythe rest

 

1(x + 6)^2   -  27

 

"a"  is an understood 1

 

u = 6

 

v =  -27

 

 

cool cool cool

 Jan 30, 2021

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