divide:(31x-2x^2-12x^3-20) by (2-4x)
Answers
Answered by
0
Answer:
i can't do it I am in lower class
Answered by
0
Step-by-step explanation:
Richard G.
Apr 23, 2016
6
x
2
+
7
x
+
2
Explanation:
Rearrange the top expression to standard format
12
x
3
+
20
x
2
+
11
x
+
2
2
x
+
1
I prefer to set the question as long division. How many
2
x
s can you take from
12
x
3
?
12
2
=
6
,
x
3
x
=
x
2
.
So,
6
x
2
Multiply the divisor
2
x
+
1
by
6
x
2
and subtract.
(
2
x
+
1
)
×
(
6
x
2
)
=
(
12
x
3
+
6
x
2
)
(
12
x
3
+
20
x
2
+
11
x
+
2
)
−
(
12
x
3
+
6
x
2
)
=
(
14
x
2
+
11
x
+
2
)
How many
2
x
s can you take from
14
x
2
? .....
7
x
Multiply the divisor
2
x
+
1
by
7
x
and subtract.
(
14
x
2
+
11
x
+
2
)
−
(
14
x
2
+
7
x
)
=
(
4
x
+
2
)
How many
2
x
s can you take from
4
x
?.....2
Multiply the divisor
2
x
+
1
by
2
and subtract.
(
4
x
+
2
)
−
(
4
x
+
2
)
=
0
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