Find the LCD of (x2-9) and (x2+3x+2)

Question

Find the LCD of  (x2-9) and (x2+3x+2)

anonymous · Answer

lcd?

anonymous · Answer

lowest term?

anonymous · Answer

1st expression = x^2-9
since, it is in the form of a^2-b^2,we factorixe it by fromula (a+b) (a-b)
then we get, (x)^2 -(3)^2
                  =(x-3) (x+3)
Now, 2nd expression= x^2+3x+2
                                =x^2+ (2+1)x+2
                                = x^2+2x+x+2 
taking x 1st two terms anmd 1 as common in last 2 terms,we get
                              = x(x+2)+1(x+2)
                               =(x+2) (x+1)
therefore, LCD = (x-3) (x+3) (x+2) (x+1)

anonymous · Answer

sory,,dre's an error..actualy its''takin x common in 1st 2 terms" hope u got it!!!