Search 75,455 tutors
FIND TUTORS
Ask a question
0 0

When solving equation by factoring.

Tutors, please sign in to answer this question.

1 Answer

Do you mean something like this?
 
x2 + 3x + 2 = 0
 
(x + 2)(x + 1) = 0
 
so x + 2 = 0 and x + 1 = 0
 
then, x = -2 and x = -1
 
to check these, just plug them into the original equation in place of x:
 
(-2)2 + 3(-2) + 2 = 0 ??
          4 + -6 + 2 = 0 ??
             -2    + 2 = 0 ??
                       0 = 0  true!
 
repeat with x = -1 ....