5(a-b)3-7(a-b)2 factorise
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Answer:
Answer
Given,
a
7
−ab
6
=a(a
6
−b
6
)
=a((a
3
)
2
−(b
3
)
2
)
=a(a
3
−b
3
)(a
3
3
+b
3
) and (a
3
−b
3
a
7
−ab
6
=a(a−b)(a
2
+ab+b
2
)(a+b)(a
2
−ab+b
2
)
=a(a−b)(a+b)(a
2
+ab+b
2
)(a
2
−ab
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