Divide and find the answer: 3x^2+10x+7 by x-1
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Answered by
0
Answer:
We can Split the Middle Term of this expression to factorise it.
In this technique, if we have to factorise an expression like
a
x
2
+
b
x
+
c
, we need to think of 2 numbers such that:
N
1
⋅
N
2
=
a
⋅
c
=
3
⋅
7
=
21
AND
N
1
+
N
2
=
b
=
−
10
After trying out a few numbers we get
N
1
=
−
7
and
N
2
=
−
3
(
−
7
)
⋅
(
−
3
)
=
21
, and
(
−
7
)
+
(
−
3
)
=
−
10
3
x
2
−
10
x
+
7
=
3
x
2
−
3
x
−
7
x
+
7
=
3
x
(
x
−
1
)
−
7
(
x
−
1
)
=
(
3
x
−
7
)
(
x
−
1
)
Answered by
1
Step-by-step explanation:
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