25x2/9-4y2plz factorise it
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Answer:
Step-by-step explanation:
for which you know that
a
2
−
b
2
=
(
a
−
b
)
(
a
+
b
)
In your case, you can write
25
x
2
−
9
=
5
x
⋅
5
x
−
3
⋅
3
, which is equivalent to
(
5
x
)
2
−
3
2
=
(
5
x
−
3
)
(
5
x
+
3
)
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