5a^3b - 7ab^3 by ab
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Answer:
5a
3
b−7ab
3
=
ab
5a
3
b
−
ab
7ab
3
=
ab
5a
3
b
−
ab
7ab
3
=
a×b
5×a×a×a×b
−
a×b
7×a×b×b×b
=5a
2
−7b
2
Hence,
ab
5a
3
b−7ab
3
=5a
2
−7b
2
.
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