4.1 and 4.2 Equivalent Expressions
Expressions that represent the same quantity when the same
number is substituted for the variable in each expression are
equivalent expressions
called _______________________________________________.
Are the two expressions are equivalent
when x
=
𝑥 2 + 3(𝑥 − 1) + 1
12 + 2(𝑥 + 3)
12
+
12
2(4
+
12
+
3)
42
2(7)
+
4 ?
14
+
3(4
1)
+
42
+
3(3)
+
1
16
+
3(3)
+
1
16
26
-
+
9
+
1
1
26
Yes, the expressions are equivalent when
x = 4