Factorise 49x4 - 121y2
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Answer:
49
x
2
−
121
y
2
can be written as
(
7
x
)
2
−
(
11
y
)
2
this is of the form:
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
here:
a
=
7
x
and
b
=
11
y
so ,
(
7
x
)
2
−
(
11
y
)
2
=
(
7
x
+
11
y
)
(
7
x
−
11
y
)
the factorized form of
49
x
2
−
121
y
2
is:
(
7
x
+
11
y
)
(
7
x
−
11
y
)
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