# Question #b9935

##### 1 Answer

Apr 6, 2017

#### Explanation:

To

#color(blue)"complete the square"#

#• "add " (1/2" coefficient of x-term")^2#

#"that is " (6/2)^2=9#

#rArrf(x)=(x^2+6xcolor(red)(+9))color(red)(-9)-7#

#rArrf(x)=(x+3)^2-16#

#"Note add 9 to complete the square so 9 must be subtracted"#