factorise:- x^2-9-4x+4
Answers
Answered by
0
Answer:
Rewrite
9
as
3
2
.
3
2
−
4
x
2
Rewrite
4
x
2
as
(
2
x
)
2
.
3
2
−
(
2
x
)
2
Since both terms are perfect squares, factor using the difference of squares formula,
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
where
a
=
3
and
b
=
2
x
.
(
3
+
2
x
)
(
3
−
(
2
x
)
)
Multiply
2
by
−
1
.
(
3
+
2
x
)
(
3
−
2
x
)
Step-by-step explanation:
Answered by
1
Answer:
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Step-by-step explanation:
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