Basic HTML Version
658
x
2
x
x
1
¼
1;
4
x
2
1
2
x
þ
1
þ
2
¼
0
[Impossibili]
659
x
x
1
þ
1
x
2
¼
2
x
3
x
2
3
x
þ
2
[Impossibile]
660
ð
x a
Þð
1
x
þ
3
a
Þ
a
2
þ
a
þ
x
2
þ
a
2
a
2
¼
3
x
a
2
a
,
a
2
661
ð
a
þ
1
Þ
x
2
¼
x
þ
x
ð
a
þ
1
Þ
1
2
a
þ
1
1
a
þ
1
,
1
2
a
þ
1
662
x
2
a
1
2
1
a
¼
2
a
þ
2
ð
x
1
Þ
2
a
a
2
,
2
a
a
þ
2
663
b
2
ð
1
þ
x
2
Þ þ
x
1 2
b
2
b
x
¼
2
b
ð
bx
1
Þ
bx
þ
b
b
b
þ
1
b
,
b
b
1
664
x
þ
a
þ
1
x a
þ
x
þ
2
a
x
3
a
þ
1
¼
1
x a
2
a
,
a
3
h
i
665
a
þ
x
x
þ
1
ð
x
2
Þ ¼
x
2
x a
ax
2
ð
x
þ
a
Þ
a x
a
, 2
½
666
x
2
þ
a
2
x
ð
x
þ
a
Þ
2
a
2
þ
9 1
þ
a
x
þ
2
a
¼
23
x
21
a
2
ð
x a
Þ
2
a
,
5
a
3
667
a
1
x
þ
a
1
x
3
a
þ
2
x
2
x
2
2
ax
3
a
2
¼
0
a
ffiffi
2
p
668
x
þ
a
3
x a
þ
3
þ
x a
þ
3
x
þ
a
3
¼
2
a
2
þ
18 4
a
x
2
a
2
9
þ
6
a
2
ffiffi
a
p ½
669
a
þ
x
a x
þ
a x
a
þ
x
:
1
a x
a
þ
x
þ
13
10
¼
0
5
a
,
2
3
a
670
x
4
5
x
2
¼
0
0, 0,
ffiffi
5
p
h
i
671
2
x
4
15
x
3
þ
18
x
2
¼
0
0, 0,
3
2
, 6
672
x
3
þ
x x
2
1
¼
0
[1]
673
x
3
9
x
2
þ
27
x
27
¼
0
[3, 3, 3]
674
2
x
3
3
x
2
2
x
þ
3
¼
0
1,
3
2
675
x
3
3
x
2
10
x
¼
0
0, 2, 5
½
676
24
x
3
14
x
2
63
x
þ
45
¼
0
3
2
,
3
4
,
5
3
677
4
x
3
24
x
2
þ
23
x
þ
18
¼
0
2,
9
2
,
1
2
678
x
4
þ
2
x
3
5
x
2
4
x
þ
6
¼
0
1, 3,
ffiffi
2
p
679
x
2
4
x
¼
12
þ
4
x x
2
x
2
4
x
2, 2
ffiffi
7
p
680
8
x
2
þ
1
2
x
þ
1
þ
6
x
þ
3
8
x
2
þ
1
¼
4
0, 1,
1
4
84
Sezione 1
Equazioni, disequazioni e sistemi non lineari