Question 624896
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
If (a+1)(a+2) = 0
Then
(a + 1) = 0
    a = -1
or
(a + 2) = 0
   a = -2
If (a+1)(a+2) = 0,  then a = -1   or a = -2

n^2 + 3n -12 = 6
n^2 + 3n -18 = 0
factoring:
(n + 6)(n - 3) = 0
AND
(n + 6) = 0
or
(n - 3) = 0
  n = -6   or n = 3