Simplify: a2
b (a3– a + 1) – ab(a4 – 2a2 + 2a) – b(a3– a2 – 1)
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Answer:
=a5b-a3b+a2b-a5b+2a3b-2a2b-a3b+a2b+b
=2a2b-a5b-2a2b+b
=-a5b+b
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