Which model represents the factors of x2 + 9x + 8?
+
+
+x
+
+
x
+x?
+x+X X + + +X
+
+
+X
+
+
-
+
+
+
+X
+
-
+
+X
+
+
+
-
1
-
+
+x
+
+
+
+x²
+X
+X +X +X +X
+
+
+
+
+
+
+
+
+x
+
+
+