Factorise by using suitable identity 2x^2-18
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1
Answer:
The answer is
2(x+3)(x−3) .
Step-by-step explanation:
Explanation:
2
x
2
−
18
Factor out the GCF
2
.
2
(
x
2
−
9
)
x
2
−
9
fits the form
a
2
−
b
2
, where
a
=
x
and
b
=
3
.
Rewrite the expression.
2
(
x
2
−
3
2
)
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
2(x+3)(x−3)
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