factorise asquare + b square -c square -2ab
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Answered by
22
Answer:
−
b
2
+
(
a
−
1
)
2
Reorder
−
b
2
and
(
a
−
1
)
2
.
(
a
−
1
)
2
−
b
2
Since both terms are perfect squares, factor using the difference of squares formula,
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
where
a
=
a
−
1
and
b
=
b
.
Hope it helps
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