Question

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

Answer 1

lcd?

Answer 2

lowest term?

Answer 3

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)

Answer 4

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