Respuesta :
Answer:
9a4−a2b−8b2
Step-by-step explanation:
=(9a2+8b)(a2+−b)
=(9a2)(a2)+(9a2)(−b)+(8b)(a2)+(8b)(−b)
=9a4−9a2b+8a2b−8b2
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Answer:
9a4−a2b−8b2
Step-by-step explanation:
=(9a2+8b)(a2+−b)
=(9a2)(a2)+(9a2)(−b)+(8b)(a2)+(8b)(−b)
=9a4−9a2b+8a2b−8b2