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Byju's Answer
Standard VII
Mathematics
Coefficient of a Term
Resolve each ...
Question
Resolve each of the following quadratic trinomial into factor:
14x
2
+ 11xy − 15y
2
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Solution
The
given
expression
is
14
x
2
+
11
xy
-
15
y
2
.
(
Coefficient
of
x
2
=
14
,
coefficient
of
x
=
11
y
and
constant
term
=
-
15
y
2
)
Now
,
we
will
split
the
coefficient
of
x
into
two
parts
such
that
their
sum
is
11
y
and
their
product
equals
the
product
of
the
coefficient
of
x
2
and
the
constant
term
,
i
.
e
.
,
14
×
(
-
15
y
2
)
=
-
210
y
2
.
Now
,
21
y
+
(
-
10
y
)
=
11
y
and
21
y
×
(
-
10
y
)
=
-
210
y
2
Replacing
the
middle
term
-
11
xy
by
-
10
xy
+
21
xy
,
we
get
:
14
x
2
+
11
xy
-
15
y
2
=
14
x
2
-
10
xy
+
21
xy
-
15
y
2
=
(
14
x
2
-
10
xy
)
+
(
21
xy
-
15
y
2
)
=
2
x
(
7
x
-
5
y
)
+
3
y
(
7
x
-
5
y
)
=
(
2
x
+
3
y
)
(
7
x
-
5
y
)
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