2x + y = 19
2x - 3y = -3 by cramer's rule
Answers
Answered by
0
Step-by-step explanation:
Explanation:
x
3
−
6
x
2
+
13
x
−
10
=
0
x
3
−
3
(
x
)
2
(
2
)
+
3
(
2
)
2
x
+
x
−
2
3
−
2
=
0
(
x
3
−
3
(
x
)
2
(
2
)
+
3
x
(
2
)
2
−
2
3
)
+
x
−
2
=
0
We can factorize using the polynomial identity that follows:
(
a
−
b
)
3
=
a
3
−
3
a
2
b
+
3
a
b
2
+
b
3
where in our case
a
=
x
and
b
=
2
So,
(
x
−
2
)
3
+
(
x
−
2
)
=
0
taking
x
−
2
as common factor
(
x
−
2
)
(
(
x
−
2
)
2
+
1
)
=
0
(
x
−
2
)
(
x
2
−
4
x
+
4
+
1
)
=
0
(
x
−
2
)
(
x
2
−
4
x
+
5
)
=
0
x
−
2
=
0
then
x
=
2
Or
x
2
−
4
x
+
5
=
0
δ
=
(
−
4
)
2
−
4
(
1
)
(
5
)
=
16
−
20
is a currect answer please vote me
=
−
4
<
0
δ
<
0
⇒
no root in R
Answered by
1
Answer:
r is the correct answer
Step-by-step explanation:
give me thanks
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