Basic HTML Version
607
x
4
þ
8
x
3
þ
22
x
2
þ
24
x
þ
9
¼
0
1, 1, 3, 3
½
608
24
x
3
10
x
2
3
x
þ
1
¼
0
1
2
,
1
3
,
1
4
609
x
3
3
ax
2
a
2
x
þ
3
a
3
¼
0
a
,
a
, 3
a
½
610
x
3
6
ax
2
þ
11
a
2
x
6
a
3
¼
0
a
, 2
a
, 3
a
½
611
a b
ð
Þ
x
3
3
a b
ð
Þ
x
2
þ
3
a
þ
b
ð
Þ
x a
þ
b
ð
Þ ¼
0
1, 1,
a
þ
b
a b
612
x
4
4
ax
3
9
a
2
x
2
þ
16
a
3
x
þ
20
a
4
¼
0
a
,
2
a
, 5
a
½
613
x
3
5
x
2
þ
14
x
16
¼
0
½
2
614
5
x
3
þ
39
x
2
13
x
þ
1
¼
0
1
5
, 4
ffiffiffiffiffi
17
p
615
4
x
3
13
x
2
13
x
þ
4
¼
0
1, 4,
1
4
616
x
4
2
a
þ
b
ð
Þ
x
3
þ
a
2
þ
b
2
þ
4
ab x
2
2
ab a
þ
b
ð
Þ
x
þ
a
2
b
2
¼
0
[
a
,
a
,
b
,
b
]
617
12
x
4
8
x
3
7
x
2
þ
2
x
þ
1
¼
0
1
2
,
1
2
, 1,
1
3
618
18
x
4
þ
27
x
3
þ
x
2
12
x
4
¼
0
1,
2
3
,
2
3
,
1
2
619
48
x
4
þ
4
x
3
16
x
2
x
þ
1
¼
0
1
2
,
1
2
,
1
3
,
1
4
620
2
x
3
7
x
2
þ
7
x
2
¼
0
1, 2,
1
2
621
2
x
3
þ
3
x
2
þ
3
x
þ
2
¼
0
1
½
622
2
x
4
þ
5
x
3
5
x
2
¼
0
1;
þ
1;
1
2
; 2
623
x
4
2
x
3
þ
2
x
1
¼
0
½
1;
þ
1;
þ
1;
þ
1
624
3
x
4
4
ffiffi
3
p
x
3
þ
4
ffiffi
3
p
x
3
¼
0
1;
þ
1;
ffiffi
3
p
;
ffiffi
3
p
3
"
#
625
x
4
4
x
3
þ
4
x
1
¼
0
1;
þ
1; 2
ffiffi
3
p
LEARNING MATHS IN ENGLISH
Competenza
Saper apprendere e comunicare in una lingua straniera
QUESTIONS
Answer the question
626
The value
x
¼
1 is a solution for the fol-
lowing equation:
2
x
3
5
x
2
þ
x
þ
2
¼
0
:
Yes
No Why?
True or false?
627
The equation
x
3
1
¼
0:
T F
a)
is satisfied by
x
¼
1;
b)
is verified by
x
¼
1;
c)
has 3 solutions;
d)
has only one solution;
e)
is impossible.
78
Sezione 1
Equazioni, disequazioni e sistemi non lineari