Factorize :
81
x
4
-
121
x
2
Matching exercise
Match the items on the right to the items on the left.
Check
OK
Step 1
Step 2
Step 3
81
x
4
-
121
x
2
=
x
2
81
x
2
-
121
=
x
2
9
x
2
-
11
2
=
x
2
9
x
+
11
9
x
-
11