0
Anonymous
(b + 2)(b - 8)
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(b + 2) is a factor.
2
6b
You can take 5 out of both of those, leaving 6b and 1.
9a4-b2=36a-2b=2(18-b) But if you meant 9a^4-b^2 it is not possible to factor
4(16a4 + b2)
(3a + b)(3a - b)