Chapter 10 QuadratiC EQuations 353
- xx
xx
xx
(^27120)
340
30 40
33
++=
++=
+= +=
−− −
()()
444
34
−
xx=− =−
- xx
xx
xx
x
2
2
815
15 15
8150
350
30
+=−
++
++=
++=
+=
()()
xx
xx
+=
−− −−
=− =−
50
33 55
35
- xx
xx
xx
xx
2
2
10 21
21 21
10 21 0
370
30 7
−=−
++
−+=
−−=
−= −
()()
==
++ ++
==
0
33 77
37
xx
- 320
32 10
32010
22 11
3
xx^2
xx
xx
x
−−=
+−=
+= −=
−− ++
=
()()
−−=
=−
21
2
3
x
x
- 485
55
4850
150
21025
2
2
xx
xx
xx
xx
−=
−−
−−=
+−=
+= −
(2 )(2 )
==
−− ++
=− =
=− =
0
11 55
21 25
1
2
5
2
xx
xx