Question No. 9
If 3 <=
3x – 18 <=18 then which one of the following is true?
Answers
Answered by
0
Step-by-step explanation:
The answer is
(
−
∞
<
x
<
−
3
)
∪
(
6
<
x
<
+
∞
)
Explanation:
We factorise the expression
x
2
−
3
x
−
18
=
(
x
+
3
)
(
x
−
6
)
then we do a sign chart
a
a
a
a
a
x
a
a
a
a
−
∞
a
a
a
a
−
3
a
a
a
a
6
a
a
a
+
∞
a
a
a
a
a
x
+
3
a
a
a
a
a
−
a
a
0
a
a
+
a
a
+
a
a
a
a
a
x
−
6
a
a
a
a
a
−
a
a
a
a
a
−
a
a
+
a
(
x
−
6
(
(
x
+
3
)
a
a
+
a
a
a
a
a
−
a
a
+
So
x
2
−
3
x
−
18
>
0
when
−
∞
<
x
<
−
3
and
6
<
x
<
+
∞
Answered by
1
Answer:
answer is in the photo...........
Attachments:
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