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OpenStudy (anonymous):
If (8z − 9)(8z + 9) = az2 − b, what is the value of a? The value of a is ____________.
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OpenStudy (anonymous):
Distribute (8z − 9)(8z + 9) on the left side of the equation first.
OpenStudy (anonymous):
64z+81=az2-b?
OpenStudy (anonymous):
Yes, so 64 is a.
OpenStudy (anonymous):
Thank you so much!!
OpenStudy (anonymous):
The equation is actually 64z^2-81=az^2-b, also can be (8z)^2−81. And, you're welcome!
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