226 Answer Key
4424
218
2
2
xy xy y
x
4 xy−
=
4
2
y()x^2 x 6
()x^29
=
22
2
⋅ (^2) ()+ (^2) () 3
()^3 ()−^3
y(
(^3) )(
2 2
2
()()xx^33322 yy()x^2
()()xx^333 ()x+^3
2
3
y
x
()x^2
- xy
xy^33 y
=
()xy⋅
()xy()xxxyyy
1
++xy y
= 221
xx^2 xyyy
xx
x
x
x
2
2
44
9
26 x
2
4 xx
−
⋅
−
=
()()
()+ ()
⋅
()
()−
− )(
+ )(
))(( −
))(( −
2 ( −
=
()()()
()+ ()()
⋅
()()
()()−−
−− )(
+ )(
))(( −
))(( −−
(^2) ( −−
()
- (^2) ( −
x 3
x
x
x
x
−
÷
1 +
21 x−
1
42 x−
−
⋅
x
x
x
x
1
21 x−
42 x−
1
= ()
−
()
⋅ ()
−
− ()+
(^2) (
()−
()()
⋅
()()−
−− ()+
(^2) (
= ()
(^2) ( −
x 1
13.^2
23
4
xx^2222 x^3
+
−
=
()+ ()
+
()−
2
)( −
4
+ ))((
=
()+ ()
+
()
()+ ()
2
)( −
4 ( +
+ ))(( + )))((( −
=
()+ ()
+
()+ ()
2
)( −
44 +
+ ))(( )( −
x
+ ))((
=
()+ ()
46 +
)( −
x
+ ))((
=
()+
()+ ()−
22 3
13
x
xx