Factorize :
x
2
-
21
x
+
108
Matching exercise
Match the items on the right to the items on the left.
Check
OK
Step 1
Step 2
Step 3
Step 4
x
2
-
21
x
+
108
=
x
2
-
12
x
-
9
x
+
108
=
x
2
-
12
x
-
9
x
-
108
=
x
(
x
-
12
)
-
9
(
x
-
12
)
=
(
x
-
12
)
(
x
-
9
)