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04-12-2020
Mathematics

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Аноним Аноним

04-12-2020

Answer:

−b4+2b2+35

Step-by-step explanation:

b2+5)(−b2+7)

=(b2)(−b2)+(b2)(7)+(5)(−b2)+(5)(7)

=−b4+7b2−5b2+35

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