Question

Factor this expression . 9a4 - b2

Answer 1

Answer:

(3a2+b) (3a2-b)

Step-by-step explanation:

9a4-b2

applying a2-b2=(a-b) (a+b) formula,

9a4-b2=(3a2)2-b2

=(3a2+b)(3a2-b)

Answer 2

Answer:

Please

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