216 algebra De mystif ieD
2.^6
52
9
xx− 76
=
+
This equation is in the form “Fraction = Fraction,”
so cross-multiply.
67 6952
42 36 45 18
42 42
36 318
18
()xx()
xx
xx
x
+= −
+= −
−−
=−
+ ++
=
=
=
18
54 3
54
3
18
x
x
x
- (x − 7)^2 − 4 = (x + 1)^2
()()xx ()()xx
xxxxxx
x
−−−= ++
−−+−= +++
77411
(^22774941)
(^2) −−+=++
−+=+
−−
−
14 45 21
14 45 21
22
1
xx^22 xx
xx
xx
,scancel
66451
45 45
16 44
44
16
11
4
(^234)
x
x
x
x
+=
−−
−=−
=−
−
= or